816440012580 has 24 divisors (see below), whose sum is σ = 2286032035392. Its totient is φ = 217717336672.

The previous prime is 816440012551. The next prime is 816440012611. The reversal of 816440012580 is 85210044618.

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, 6803666712 + ... + 6803666831.

It is an arithmetic number, because the mean of its divisors is an integer number (95251334808).

Almost surely, 2^816440012580 is an apocalyptic number.

It is an amenable number.

816440012580 is an abundant number, since it is smaller than the sum of its proper divisors (1469592022812).

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

816440012580 is a wasteful number, since it uses less digits than its factorization.

816440012580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607333555 (or 13607333553 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The spelling of 816440012580 in words is "eight hundred sixteen billion, four hundred forty million, twelve thousand, five hundred eighty".