91000911002 has 8 divisors (see below), whose sum is σ = 136967242356. Its totient is φ = 45345163552.

The previous prime is 91000910977. The next prime is 91000911031. The reversal of 91000911002 is 20011900019.

It can be written as a sum of positive squares in 2 ways, for example, as 78679689001 + 12321222001 = 280499^2 + 111001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77645243 + ... + 77646414.

Almost surely, 2^91000911002 is an apocalyptic number.

91000911002 is a deficient number, since it is larger than the sum of its proper divisors (45966331354).

91000911002 is a wasteful number, since it uses less digits than its factorization.

91000911002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155291952.

The product of its (nonzero) digits is 162, while the sum is 23.

The spelling of 91000911002 in words is "ninety-one billion, nine hundred eleven thousand, two".