81037463268 has 48 divisors (see below), whose sum is σ = 200489022720. Its totient is φ = 25388112384.

The previous prime is 81037463261. The next prime is 81037463279. The reversal of 81037463268 is 86236473018.

It is not an unprimeable number, because it can be changed into a prime (81037463261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129571 + ... + 422922.

It is an arithmetic number, because the mean of its divisors is an integer number (4176854640).

Almost surely, 2^81037463268 is an apocalyptic number.

It is an amenable number.

81037463268 is an abundant number, since it is smaller than the sum of its proper divisors (119451559452).

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

81037463268 is a wasteful number, since it uses less digits than its factorization.

81037463268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553236 (or 553234 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 81037463268 in words is "eighty-one billion, thirty-seven million, four hundred sixty-three thousand, two hundred sixty-eight".