64004668155 has 128 divisors (see below), whose sum is σ = 122735001600. Its totient is φ = 31548787200.

The previous prime is 64004668141. The next prime is 64004668207. The reversal of 64004668155 is 55186640046.

64004668155 is a `hidden beast` number, since 64 + 0 + 0 + 466 + 81 + 55 = 666.

It is not a de Polignac number, because 64004668155 - 2¹⁴ = 64004651771 is a prime.

It is a super-2 number, since 2×64004668155² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64004668155.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19869445 + ... + 19872665.

It is an arithmetic number, because the mean of its divisors is an integer number (958867200).

Almost surely, 2^64004668155 is an apocalyptic number.

64004668155 is a deficient number, since it is larger than the sum of its proper divisors (58730333445).

64004668155 is a wasteful number, since it uses less digits than its factorization.

64004668155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3436 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 64004668155 in words is "sixty-four billion, four million, six hundred sixty-eight thousand, one hundred fifty-five".