88618740721 has 45 divisors (see below), whose sum is σ = 110329835721. Its totient is φ = 70966676088.

The previous prime is 88618740713. The next prime is 88618740871. The reversal of 88618740721 is 12704781688.

The square root of 88618740721 is 297689.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 88618740721 - 2³ = 88618740713 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (88618740521) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2060900926 + ... + 2060900968.

Almost surely, 2^88618740721 is an apocalyptic number.

88618740721 is the 297689-th square number.

88618740721 is the 148845-th centered octagonal number.

It is an amenable number.

88618740721 is a deficient number, since it is larger than the sum of its proper divisors (21711095000).

88618740721 is an frugal number, since it uses more digits than its factorization.

88618740721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 52.

The spelling of 88618740721 in words is "eighty-eight billion, six hundred eighteen million, seven hundred forty thousand, seven hundred twenty-one".