64561752294 has 32 divisors (see below), whose sum is σ = 139096034784. Its totient is φ = 19859447040.

The previous prime is 64561752253. The next prime is 64561752323. The reversal of 64561752294 is 49225716546.

It is a happy number.

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, 158434 + ... + 392714.

It is an arithmetic number, because the mean of its divisors is an integer number (4346751087).

Almost surely, 2^64561752294 is an apocalyptic number.

64561752294 is an abundant number, since it is smaller than the sum of its proper divisors (74534282490).

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

64561752294 is a wasteful number, since it uses less digits than its factorization.

64561752294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237832.

The product of its digits is 3628800, while the sum is 51.

It can be divided in two parts, 6456 and 1752294, that added together give a triangular number (1758750 = T₁₈₇₅).

The spelling of 64561752294 in words is "sixty-four billion, five hundred sixty-one million, seven hundred fifty-two thousand, two hundred ninety-four".