64600974155 has 4 divisors (see below), whose sum is σ = 77521168992. Its totient is φ = 51680779320.

The previous prime is 64600974127. The next prime is 64600974223. The reversal of 64600974155 is 55147900646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55147900646 = 2 ⋅27573950323.

It is a de Polignac number, because none of the positive numbers 2^k-64600974155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6460097411 + ... + 6460097420.

It is an arithmetic number, because the mean of its divisors is an integer number (19380292248).

Almost surely, 2^64600974155 is an apocalyptic number.

64600974155 is a deficient number, since it is larger than the sum of its proper divisors (12920194837).

64600974155 is a wasteful number, since it uses less digits than its factorization.

64600974155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12920194836.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 64600974155 in words is "sixty-four billion, six hundred million, nine hundred seventy-four thousand, one hundred fifty-five".