64939142887596 has 18 divisors (see below), whose sum is σ = 164151722299292. Its totient is φ = 21646380962520.

The previous prime is 64939142887543. The next prime is 64939142887603. The reversal of 64939142887596 is 69578824193946.

It is a happy number.

64939142887596 is a `hidden beast` number, since 6 + 4 + 9 + 3 + 9 + 14 + 2 + 8 + 8 + 7 + 596 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×64939142887596² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 901932540070 + ... + 901932540141.

Almost surely, 2^{64939142887596} is an apocalyptic number.

It is an amenable number.

64939142887596 is an abundant number, since it is smaller than the sum of its proper divisors (99212579411696).

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

64939142887596 is a wasteful number, since it uses less digits than its factorization.

64939142887596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803865080221 (or 1803865080216 counting only the distinct ones).

The product of its digits is 5643509760, while the sum is 81.

The spelling of 64939142887596 in words is "sixty-four trillion, nine hundred thirty-nine billion, one hundred forty-two million, eight hundred eighty-seven thousand, five hundred ninety-six".