89031440691 has 48 divisors (see below), whose sum is σ = 135201081600. Its totient is φ = 56377024704.

The previous prime is 89031440653. The next prime is 89031440699. The reversal of 89031440691 is 19604413098.

89031440691 is a `hidden beast` number, since 8 + 90 + 31 + 440 + 6 + 91 = 666.

It is not a de Polignac number, because 89031440691 - 2²² = 89027246387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89031440699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15018370 + ... + 15024296.

It is an arithmetic number, because the mean of its divisors is an integer number (2816689200).

Almost surely, 2^89031440691 is an apocalyptic number.

89031440691 is a deficient number, since it is larger than the sum of its proper divisors (46169640909).

89031440691 is a wasteful number, since it uses less digits than its factorization.

89031440691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6888 (or 6885 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 89031440691 in words is "eighty-nine billion, thirty-one million, four hundred forty thousand, six hundred ninety-one".