91111950002 has 4 divisors (see below), whose sum is σ = 136667925006. Its totient is φ = 45555975000.

The previous prime is 91111949993. The next prime is 91111950011. The reversal of 91111950002 is 20005911119.

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

It is an interprime number because it is at equal distance from previous prime (91111949993) and next prime (91111950011).

It can be written as a sum of positive squares in only one way, i.e., 90955924921 + 156025081 = 301589^2 + 12491^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22777987499 + ... + 22777987502.

Almost surely, 2^91111950002 is an apocalyptic number.

91111950002 is a deficient number, since it is larger than the sum of its proper divisors (45555975004).

91111950002 is a wasteful number, since it uses less digits than its factorization.

91111950002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45555975003.

The product of its (nonzero) digits is 810, while the sum is 29.

The spelling of 91111950002 in words is "ninety-one billion, one hundred eleven million, nine hundred fifty thousand, two".