91813672802 has 4 divisors (see below), whose sum is σ = 137720509206. Its totient is φ = 45906836400.

The previous prime is 91813672787. The next prime is 91813672831. The reversal of 91813672802 is 20827631819.

It is a happy number.

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., 74965892401 + 16847780401 = 273799^2 + 129799^2 .

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, 22953418199 + ... + 22953418202.

Almost surely, 2^91813672802 is an apocalyptic number.

91813672802 is a deficient number, since it is larger than the sum of its proper divisors (45906836404).

91813672802 is a wasteful number, since it uses less digits than its factorization.

91813672802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45906836403.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 91813672802 in words is "ninety-one billion, eight hundred thirteen million, six hundred seventy-two thousand, eight hundred two".