81013271340528 has 30 divisors (see below), whose sum is σ = 226724641321464. Its totient is φ = 27004423780128.

The previous prime is 81013271340527. The next prime is 81013271340569. The reversal of 81013271340528 is 82504317231018.

81013271340528 is a `hidden beast` number, since 8 + 1 + 0 + 13 + 2 + 71 + 3 + 40 + 528 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81013271340527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281296080900 + ... + 281296081187.

Almost surely, 2^{81013271340528} is an apocalyptic number.

It is an amenable number.

81013271340528 is an abundant number, since it is smaller than the sum of its proper divisors (145711369980936).

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

81013271340528 is a wasteful number, since it uses less digits than its factorization.

81013271340528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562592162101 (or 562592162092 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 81013271340528 in words is "eighty-one trillion, thirteen billion, two hundred seventy-one million, three hundred forty thousand, five hundred twenty-eight".