81962500104 has 64 divisors (see below), whose sum is σ = 227921904000. Its totient is φ = 27291038400.

The previous prime is 81962500093. The next prime is 81962500133. The reversal of 81962500104 is 40100526918.

81962500104 is a `hidden beast` number, since 8 + 19 + 625 + 0 + 0 + 10 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7947 + ... + 404954.

It is an arithmetic number, because the mean of its divisors is an integer number (3561279750).

Almost surely, 2^81962500104 is an apocalyptic number.

It is an amenable number.

81962500104 is an abundant number, since it is smaller than the sum of its proper divisors (145959403896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81962500104 is a wasteful number, since it uses less digits than its factorization.

81962500104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413835 (or 413825 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 81962500104 in words is "eighty-one billion, nine hundred sixty-two million, five hundred thousand, one hundred four".