88691878161 has 6 divisors (see below), whose sum is σ = 128110490690. Its totient is φ = 59127918768.

The previous prime is 88691878141. The next prime is 88691878189. The reversal of 88691878161 is 16187819688.

It can be written as a sum of positive squares in only one way, i.e., 82538417025 + 6153461136 = 287295^2 + 78444^2 .

It is not a de Polignac number, because 88691878161 - 2²⁹ = 88155007249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88691878111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4927326556 + ... + 4927326573.

Almost surely, 2^88691878161 is an apocalyptic number.

It is an amenable number.

88691878161 is a deficient number, since it is larger than the sum of its proper divisors (39418612529).

88691878161 is a wasteful number, since it uses less digits than its factorization.

88691878161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854653135 (or 9854653132 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 63.

The spelling of 88691878161 in words is "eighty-eight billion, six hundred ninety-one million, eight hundred seventy-eight thousand, one hundred sixty-one".