81962492998185 has 24 divisors (see below), whose sum is σ = 148245204729024. Its totient is φ = 41812750050720.

The previous prime is 81962492998079. The next prime is 81962492998187. The reversal of 81962492998185 is 58189929426918.

81962492998185 is a `hidden beast` number, since 8 + 1 + 9 + 6 + 249 + 299 + 8 + 1 + 85 = 666.

It is not a de Polignac number, because 81962492998185 - 2⁸ = 81962492997929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81962492998187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39595406211 + ... + 39595408280.

It is an arithmetic number, because the mean of its divisors is an integer number (6176883530376).

Almost surely, 2^{81962492998185} is an apocalyptic number.

It is an amenable number.

81962492998185 is a deficient number, since it is larger than the sum of its proper divisors (66282711730839).

81962492998185 is a wasteful number, since it uses less digits than its factorization.

81962492998185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79190814525 (or 79190814522 counting only the distinct ones).

The product of its digits is 1612431360, while the sum is 81.

The spelling of 81962492998185 in words is "eighty-one trillion, nine hundred sixty-two billion, four hundred ninety-two million, nine hundred ninety-eight thousand, one hundred eighty-five".