64855388149056 has 112 divisors (see below), whose sum is σ = 191661066593280. Its totient is φ = 21505276938240.

The previous prime is 64855388149033. The next prime is 64855388149091. The reversal of 64855388149056 is 65094188355846.

64855388149056 is a `hidden beast` number, since 6 + 4 + 8 + 5 + 5 + 3 + 8 + 81 + 490 + 56 = 666.

It is a super-2 number, since 2×64855388149056² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97921401 + ... + 98581496.

Almost surely, 2^{64855388149056} is an apocalyptic number.

It is an amenable number.

64855388149056 is an abundant number, since it is smaller than the sum of its proper divisors (126805678444224).

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

64855388149056 is a wasteful number, since it uses less digits than its factorization.

64855388149056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196503109 (or 196503093 counting only the distinct ones).

The product of its (nonzero) digits is 995328000, while the sum is 72.

The spelling of 64855388149056 in words is "sixty-four trillion, eight hundred fifty-five billion, three hundred eighty-eight million, one hundred forty-nine thousand, fifty-six".