64858844968155 has 64 divisors (see below), whose sum is σ = 131935661107200. Its totient is φ = 29613991651200.

The previous prime is 64858844968067. The next prime is 64858844968171. The reversal of 64858844968155 is 55186944885846.

64858844968155 is a `hidden beast` number, since 6 + 4 + 85 + 88 + 449 + 6 + 8 + 15 + 5 = 666.

It is not a de Polignac number, because 64858844968155 - 2¹⁵ = 64858844935387 is a prime.

It is a Smith number, since the sum of its digits (81) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40612071 + ... + 42178880.

It is an arithmetic number, because the mean of its divisors is an integer number (2061494704800).

Almost surely, 2^{64858844968155} is an apocalyptic number.

64858844968155 is an abundant number, since it is smaller than the sum of its proper divisors (67076816139045).

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

64858844968155 is a wasteful number, since it uses less digits than its factorization.

64858844968155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82791801 (or 82791795 counting only the distinct ones).

The product of its digits is 10616832000, while the sum is 81.

The spelling of 64858844968155 in words is "sixty-four trillion, eight hundred fifty-eight billion, eight hundred forty-four million, nine hundred sixty-eight thousand, one hundred fifty-five".