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64400066652 = 22328971852493
BaseRepresentation
bin111011111110100010…
…110000100001011100
320011020011002100110210
4323332202300201130
52023342404113102
645330204532420
74436615351235
oct737642604134
9204204070423
1064400066652
1125348182289
1210593551110
1360c421461c
14318cdc808c
151a1dba136c
hexefe8b085c

64400066652 has 24 divisors (see below), whose sum is σ = 150318773136. Its totient is φ = 21459267328.

The previous prime is 64400066603. The next prime is 64400066671. The reversal of 64400066652 is 25666000446.

It is a self number, because there is not a number n which added to its sum of digits gives 64400066652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891483 + ... + 961010.

It is an arithmetic number, because the mean of its divisors is an integer number (6263282214).

Almost surely, 264400066652 is an apocalyptic number.

It is an amenable number.

64400066652 is an abundant number, since it is smaller than the sum of its proper divisors (85918706484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64400066652 is a wasteful number, since it uses less digits than its factorization.

64400066652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855397 (or 1855395 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 64400066652 in words is "sixty-four billion, four hundred million, sixty-six thousand, six hundred fifty-two".

Divisors: 1 2 3 4 6 12 2897 5794 8691 11588 17382 34764 1852493 3704986 5557479 7409972 11114958 22229916 5366672221 10733344442 16100016663 21466688884 32200033326 64400066652