64759891982136 has 64 divisors (see below), whose sum is σ = 174354379248000. Its totient is φ = 19926026448768.

The previous prime is 64759891982117. The next prime is 64759891982171. The reversal of 64759891982136 is 63128919895746.

It is a Harshad number since it is a multiple of its sum of digits (78).

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, 96040515 + ... + 96712461.

It is an arithmetic number, because the mean of its divisors is an integer number (2724287175750).

Almost surely, 2^{64759891982136} is an apocalyptic number.

It is an amenable number.

64759891982136 is an abundant number, since it is smaller than the sum of its proper divisors (109594487265864).

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

64759891982136 is a wasteful number, since it uses less digits than its factorization.

64759891982136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980868 (or 980864 counting only the distinct ones).

The product of its digits is 1410877440, while the sum is 78.

The spelling of 64759891982136 in words is "sixty-four trillion, seven hundred fifty-nine billion, eight hundred ninety-one million, nine hundred eighty-two thousand, one hundred thirty-six".