91000011002 has 4 divisors (see below), whose sum is σ = 136500016506. Its totient is φ = 45500005500.

The previous prime is 91000010963. The next prime is 91000011013. The reversal of 91000011002 is 20011000019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 89664912481 + 1335098521 = 299441^2 + 36539^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22750002749 + ... + 22750002752.

Almost surely, 2^91000011002 is an apocalyptic number.

91000011002 is a deficient number, since it is larger than the sum of its proper divisors (45500005504).

91000011002 is a wasteful number, since it uses less digits than its factorization.

91000011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45500005503.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 91000011002 in words is "ninety-one billion, eleven thousand, two".