909101009091 has 64 divisors (see below), whose sum is σ = 1393243255296. Its totient is φ = 522358502400.

The previous prime is 909101009081. The next prime is 909101009123. The reversal of 909101009091 is 190900101909.

It is not a de Polignac number, because 909101009091 - 2⁹ = 909101008579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (909101009081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7912431 + ... + 8026503.

It is an arithmetic number, because the mean of its divisors is an integer number (21769425864).

Almost surely, 2^909101009091 is an apocalyptic number.

909101009091 is a deficient number, since it is larger than the sum of its proper divisors (484142246205).

909101009091 is a wasteful number, since it uses less digits than its factorization.

909101009091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114292.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 909101009091 in words is "nine hundred nine billion, one hundred one million, nine thousand, ninety-one".