88221615516 has 36 divisors (see below), whose sum is σ = 223372082752. Its totient is φ = 29358751104.

The previous prime is 88221615497. The next prime is 88221615533. The reversal of 88221615516 is 61551612288.

88221615516 is a `hidden beast` number, since 8 + 8 + 2 + 21 + 615 + 5 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1996765 + ... + 2040468.

Almost surely, 2^88221615516 is an apocalyptic number.

It is an amenable number.

88221615516 is an abundant number, since it is smaller than the sum of its proper divisors (135150467236).

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

88221615516 is a wasteful number, since it uses less digits than its factorization.

88221615516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037850 (or 4037845 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The spelling of 88221615516 in words is "eighty-eight billion, two hundred twenty-one million, six hundred fifteen thousand, five hundred sixteen".