64659902858 has 96 divisors (see below), whose sum is σ = 109097176320. Its totient is φ = 28645488000.

The previous prime is 64659902843. The next prime is 64659902861. The reversal of 64659902858 is 85820995646.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 64659902858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173350760 + ... + 173351132.

It is an arithmetic number, because the mean of its divisors is an integer number (1136428920).

Almost surely, 2^64659902858 is an apocalyptic number.

64659902858 is a deficient number, since it is larger than the sum of its proper divisors (44437273462).

64659902858 is a wasteful number, since it uses less digits than its factorization.

64659902858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 62.

The spelling of 64659902858 in words is "sixty-four billion, six hundred fifty-nine million, nine hundred two thousand, eight hundred fifty-eight".