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64748437443 = 32195344316127
BaseRepresentation
bin111100010011010011…
…101011111111000011
320012010102121102100200
4330103103223333003
52030101044444233
645424531420243
74451345431434
oct742323537703
9205112542320
1064748437443
1125506894428
1210670154683
13614b44a0a1
1431c338d48b
151a3e567313
hexf134ebfc3

64748437443 has 48 divisors (see below), whose sum is σ = 100538081280. Its totient is φ = 40029118272.

The previous prime is 64748437417. The next prime is 64748437469. The reversal of 64748437443 is 34473484746.

It is an interprime number because it is at equal distance from previous prime (64748437417) and next prime (64748437469).

It is not a de Polignac number, because 64748437443 - 29 = 64748436931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64748437443.

It is not an unprimeable number, because it can be changed into a prime (64748437643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4006846 + ... + 4022972.

It is an arithmetic number, because the mean of its divisors is an integer number (2094543360).

Almost surely, 264748437443 is an apocalyptic number.

64748437443 is a deficient number, since it is larger than the sum of its proper divisors (35789643837).

64748437443 is a wasteful number, since it uses less digits than its factorization.

64748437443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16648 (or 16645 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 54.

The spelling of 64748437443 in words is "sixty-four billion, seven hundred forty-eight million, four hundred thirty-seven thousand, four hundred forty-three".

Divisors: 1 3 9 19 53 57 159 171 443 477 1007 1329 3021 3987 8417 9063 16127 23479 25251 48381 70437 75753 145143 211311 306413 446101 854731 919239 1338303 2564193 2757717 4014909 7144261 7692579 16239889 21432783 48719667 64298349 135740959 146159001 378645833 407222877 1135937499 1221668631 3407812497 7194270827 21582812481 64748437443