901091181992 has 8 divisors (see below), whose sum is σ = 1689545966250. Its totient is φ = 450545590992.

The previous prime is 901091181983. The next prime is 901091182001. The reversal of 901091181992 is 299181190109.

It is an interprime number because it is at equal distance from previous prime (901091181983) and next prime (901091182001).

It can be written as a sum of positive squares in only one way, i.e., 881657149156 + 19434032836 = 938966^2 + 139406^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 901091181992.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56318198867 + ... + 56318198882.

Almost surely, 2^901091181992 is an apocalyptic number.

It is an amenable number.

901091181992 is a deficient number, since it is larger than the sum of its proper divisors (788454784258).

901091181992 is a wasteful number, since it uses less digits than its factorization.

901091181992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112636397755 (or 112636397751 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 50.

The spelling of 901091181992 in words is "nine hundred one billion, ninety-one million, one hundred eighty-one thousand, nine hundred ninety-two".