81375630702 has 64 divisors (see below), whose sum is σ = 175346519040. Its totient is φ = 25082459136.

The previous prime is 81375630667. The next prime is 81375630733. The reversal of 81375630702 is 20703657318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15746523 + ... + 15751689.

It is an arithmetic number, because the mean of its divisors is an integer number (2739789360).

Almost surely, 2^81375630702 is an apocalyptic number.

81375630702 is an abundant number, since it is smaller than the sum of its proper divisors (93970888338).

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

81375630702 is a wasteful number, since it uses less digits than its factorization.

81375630702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7865.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 81375630702 in words is "eighty-one billion, three hundred seventy-five million, six hundred thirty thousand, seven hundred two".