91982172992 has 14 divisors (see below), whose sum is σ = 182527124658. Its totient is φ = 45991086464.

The previous prime is 91982172949. The next prime is 91982173021. The reversal of 91982172992 is 29927128919.

It can be written as a sum of positive squares in only one way, i.e., 83696804416 + 8285368576 = 289304^2 + 91024^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718610663 + ... + 718610790.

Almost surely, 2^91982172992 is an apocalyptic number.

It is an amenable number.

91982172992 is a deficient number, since it is larger than the sum of its proper divisors (90544951666).

91982172992 is a wasteful number, since it uses less digits than its factorization.

91982172992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437221465 (or 1437221455 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 59.

The spelling of 91982172992 in words is "ninety-one billion, nine hundred eighty-two million, one hundred seventy-two thousand, nine hundred ninety-two".