81300051204 has 24 divisors (see below), whose sum is σ = 189717823680. Its totient is φ = 27097487904.

The previous prime is 81300051191. The next prime is 81300051211. The reversal of 81300051204 is 40215000318.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179859 + ... + 441530.

It is an arithmetic number, because the mean of its divisors is an integer number (7904909320).

Almost surely, 2^81300051204 is an apocalyptic number.

It is an amenable number.

81300051204 is an abundant number, since it is smaller than the sum of its proper divisors (108417772476).

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

81300051204 is a wasteful number, since it uses less digits than its factorization.

81300051204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632299 (or 632297 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 81300051204 in words is "eighty-one billion, three hundred million, fifty-one thousand, two hundred four".