89191939956 has 24 divisors (see below), whose sum is σ = 237845173440. Its totient is φ = 25483411392.

The previous prime is 89191939931. The next prime is 89191939999. The reversal of 89191939956 is 65993919198.

It is a super-2 number, since 2×89191939956² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530904321 + ... + 530904488.

It is an arithmetic number, because the mean of its divisors is an integer number (9910215560).

Almost surely, 2^89191939956 is an apocalyptic number.

It is an amenable number.

89191939956 is an abundant number, since it is smaller than the sum of its proper divisors (148653233484).

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

89191939956 is a wasteful number, since it uses less digits than its factorization.

89191939956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061808823 (or 1061808821 counting only the distinct ones).

The product of its digits is 42515280, while the sum is 69.

The spelling of 89191939956 in words is "eighty-nine billion, one hundred ninety-one million, nine hundred thirty-nine thousand, nine hundred fifty-six".