816456122880 has 80 divisors (see below), whose sum is σ = 2610108192384. Its totient is φ = 217721630720.

The previous prime is 816456122851. The next prime is 816456122927. The reversal of 816456122880 is 88221654618.

It is a tau number, because it is divible by the number of its divisors (80).

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, 53147016 + ... + 53162375.

Almost surely, 2^816456122880 is an apocalyptic number.

816456122880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

816456122880 is an abundant number, since it is smaller than the sum of its proper divisors (1793652069504).

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

816456122880 is a wasteful number, since it uses less digits than its factorization.

816456122880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106309417 (or 106309401 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 816456122880 in words is "eight hundred sixteen billion, four hundred fifty-six million, one hundred twenty-two thousand, eight hundred eighty".