215560531120664 has 64 divisors (see below), whose sum is σ = 429252725160000. Its totient is φ = 101131850149888.

The previous prime is 215560531120633. The next prime is 215560531120667. The reversal of 215560531120664 is 466021135065512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215560531120667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 191267642 + ... + 192391350.

It is an arithmetic number, because the mean of its divisors is an integer number (6707073830625).

Almost surely, 2^{215560531120664} is an apocalyptic number.

It is an amenable number.

215560531120664 is a deficient number, since it is larger than the sum of its proper divisors (213692194039336).

215560531120664 is a wasteful number, since it uses less digits than its factorization.

215560531120664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128020 (or 1128016 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 215560531120664 in words is "two hundred fifteen trillion, five hundred sixty billion, five hundred thirty-one million, one hundred twenty thousand, six hundred sixty-four".