88640662021 has 16 divisors (see below), whose sum is σ = 92881604736. Its totient is φ = 84432370176.

The previous prime is 88640661833. The next prime is 88640662043. The reversal of 88640662021 is 12026604688.

It is a cyclic number.

It is not a de Polignac number, because 88640662021 - 2⁹ = 88640661509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88640669021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12969021 + ... + 12975853.

It is an arithmetic number, because the mean of its divisors is an integer number (5805100296).

Almost surely, 2^88640662021 is an apocalyptic number.

It is an amenable number.

88640662021 is a deficient number, since it is larger than the sum of its proper divisors (4240942715).

88640662021 is a wasteful number, since it uses less digits than its factorization.

88640662021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 88640662021 in words is "eighty-eight billion, six hundred forty million, six hundred sixty-two thousand, twenty-one".