215700494964 has 24 divisors (see below), whose sum is σ = 503351431968. Its totient is φ = 71892982560.

The previous prime is 215700494941. The next prime is 215700494969. The reversal of 215700494964 is 469494007512.

It is a super-2 number, since 2×215700494964² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215700494969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771967 + ... + 1013574.

It is an arithmetic number, because the mean of its divisors is an integer number (20972976332).

Almost surely, 2^215700494964 is an apocalyptic number.

It is an amenable number.

215700494964 is an abundant number, since it is smaller than the sum of its proper divisors (287650937004).

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

215700494964 is a wasteful number, since it uses less digits than its factorization.

215700494964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795615 (or 1795613 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 215700494964 in words is "two hundred fifteen billion, seven hundred million, four hundred ninety-four thousand, nine hundred sixty-four".