81516761076 has 24 divisors (see below), whose sum is σ = 190210451200. Its totient is φ = 27171585792.

The previous prime is 81516761009. The next prime is 81516761077. The reversal of 81516761076 is 67016761518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81516761077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793725 + ... + 890523.

Almost surely, 2^81516761076 is an apocalyptic number.

It is an amenable number.

81516761076 is an abundant number, since it is smaller than the sum of its proper divisors (108693690124).

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

81516761076 is a wasteful number, since it uses less digits than its factorization.

81516761076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166983 (or 166981 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 81516761076 in words is "eighty-one billion, five hundred sixteen million, seven hundred sixty-one thousand, seventy-six".