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64123941409 = 11231101169259
BaseRepresentation
bin111011101110000101…
…011011001000100001
320010111220111201211221
4323232011123020201
52022311212111114
645242542335041
74430023336333
oct735605331041
9203456451757
1064123941409
1125216325300
1210516b8a481
13607bc557c8
14316446b453
151a0480b524
hexeee15b221

64123941409 has 24 divisors (see below), whose sum is σ = 73477797120. Its totient is φ = 55855140000.

The previous prime is 64123941407. The next prime is 64123941421. The reversal of 64123941409 is 90414932146.

64123941409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64123941409 - 21 = 64123941407 is a prime.

It is a super-2 number, since 2×641239414092 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64123941403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294222 + ... + 463480.

It is an arithmetic number, because the mean of its divisors is an integer number (3061574880).

Almost surely, 264123941409 is an apocalyptic number.

It is an amenable number.

64123941409 is a deficient number, since it is larger than the sum of its proper divisors (9353855711).

64123941409 is a wasteful number, since it uses less digits than its factorization.

64123941409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169413 (or 169402 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 64123941409 in words is "sixty-four billion, one hundred twenty-three million, nine hundred forty-one thousand, four hundred nine".