81307837324 has 24 divisors (see below), whose sum is σ = 162642949280. Its totient is φ = 34840371456.

The previous prime is 81307837309. The next prime is 81307837333. The reversal of 81307837324 is 42373870318.

It is a super-2 number, since 2×81307837324² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71469 + ... + 409540.

Almost surely, 2^81307837324 is an apocalyptic number.

It is an amenable number.

81307837324 is an abundant number, since it is smaller than the sum of its proper divisors (81335111956).

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

81307837324 is a wasteful number, since it uses less digits than its factorization.

81307837324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487057 (or 487055 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 81307837324 in words is "eighty-one billion, three hundred seven million, eight hundred thirty-seven thousand, three hundred twenty-four".