64556712620 has 24 divisors (see below), whose sum is σ = 135656682000. Its totient is φ = 25806002112.

The previous prime is 64556712613. The next prime is 64556712637. The reversal of 64556712620 is 2621765546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010930 + ... + 1072889.

It is an arithmetic number, because the mean of its divisors is an integer number (5652361750).

Almost surely, 2^64556712620 is an apocalyptic number.

It is an amenable number.

64556712620 is an abundant number, since it is smaller than the sum of its proper divisors (71099969380).

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

64556712620 is a wasteful number, since it uses less digits than its factorization.

64556712620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085377 (or 2085375 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 64556712620 in words is "sixty-four billion, five hundred fifty-six million, seven hundred twelve thousand, six hundred twenty".