64494592891125 has 16 divisors (see below), whose sum is σ = 107319002571456. Its totient is φ = 34397116208400.

The previous prime is 64494592891013. The next prime is 64494592891129. The reversal of 64494592891125 is 52119829549446.

It is not a de Polignac number, because 64494592891125 - 2⁸ = 64494592890869 is a prime.

It is a super-2 number, since 2×64494592891125² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64494592891125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64494592891129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85992790147 + ... + 85992790896.

It is an arithmetic number, because the mean of its divisors is an integer number (6707437660716).

Almost surely, 2^{64494592891125} is an apocalyptic number.

It is an amenable number.

64494592891125 is a deficient number, since it is larger than the sum of its proper divisors (42824409680331).

64494592891125 is a wasteful number, since it uses less digits than its factorization.

64494592891125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171985581061 (or 171985581051 counting only the distinct ones).

The product of its digits is 223948800, while the sum is 69.

The spelling of 64494592891125 in words is "sixty-four trillion, four hundred ninety-four billion, five hundred ninety-two million, eight hundred ninety-one thousand, one hundred twenty-five".