215533495464 has 32 divisors (see below), whose sum is σ = 615809987520. Its totient is φ = 61580998656.

The previous prime is 215533495447. The next prime is 215533495483. The reversal of 215533495464 is 464594335512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641468569 + ... + 641468904.

It is an arithmetic number, because the mean of its divisors is an integer number (19244062110).

Almost surely, 2^215533495464 is an apocalyptic number.

215533495464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215533495464 is an abundant number, since it is smaller than the sum of its proper divisors (400276492056).

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

215533495464 is a wasteful number, since it uses less digits than its factorization.

215533495464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282937489 (or 1282937485 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 51.

The spelling of 215533495464 in words is "two hundred fifteen billion, five hundred thirty-three million, four hundred ninety-five thousand, four hundred sixty-four".