81040627132 has 24 divisors (see below), whose sum is σ = 142486969856. Its totient is φ = 40330141488.

The previous prime is 81040627123. The next prime is 81040627139. The reversal of 81040627132 is 23172604018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81040627139) 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, 8275543 + ... + 8285329.

Almost surely, 2^81040627132 is an apocalyptic number.

It is an amenable number.

81040627132 is a deficient number, since it is larger than the sum of its proper divisors (61446342724).

81040627132 is a wasteful number, since it uses less digits than its factorization.

81040627132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19297 (or 19295 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 81040627132 in words is "eighty-one billion, forty million, six hundred twenty-seven thousand, one hundred thirty-two".