81079384700 has 18 divisors (see below), whose sum is σ = 175942265016. Its totient is φ = 32431753840.

The previous prime is 81079384691. The next prime is 81079384717. The reversal of 81079384700 is 748397018.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 405396824 + ... + 405397023.

Almost surely, 2^81079384700 is an apocalyptic number.

It is an amenable number.

81079384700 is an abundant number, since it is smaller than the sum of its proper divisors (94862880316).

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

81079384700 is a wasteful number, since it uses less digits than its factorization.

81079384700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810793861 (or 810793854 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 81079384700 in words is "eighty-one billion, seventy-nine million, three hundred eighty-four thousand, seven hundred".