81737832704 has 36 divisors (see below), whose sum is σ = 177988781040. Its totient is φ = 37153559040.

The previous prime is 81737832689. The next prime is 81737832707. The reversal of 81737832704 is 40723873718.

It is not an unprimeable number, because it can be changed into a prime (81737832707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14510294 + ... + 14515925.

Almost surely, 2^81737832704 is an apocalyptic number.

It is an amenable number.

81737832704 is an abundant number, since it is smaller than the sum of its proper divisors (96250948336).

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

81737832704 is a wasteful number, since it uses less digits than its factorization.

81737832704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29026246 (or 29026232 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 81737832704 in words is "eighty-one billion, seven hundred thirty-seven million, eight hundred thirty-two thousand, seven hundred four".