81552103700 has 36 divisors (see below), whose sum is σ = 181284368412. Its totient is φ = 31825209600.

The previous prime is 81552103679. The next prime is 81552103727. The reversal of 81552103700 is 730125518.

It can be written as a sum of positive squares in 6 ways, for example, as 30896499076 + 50655604624 = 175774^2 + 225068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9941279 + ... + 9949478.

Almost surely, 2^81552103700 is an apocalyptic number.

It is an amenable number.

81552103700 is an abundant number, since it is smaller than the sum of its proper divisors (99732264712).

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

81552103700 is a wasteful number, since it uses less digits than its factorization.

81552103700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19890812 (or 19890805 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 81552103700 in words is "eighty-one billion, five hundred fifty-two million, one hundred three thousand, seven hundred".