1656056320 has 40 divisors (see below), whose sum is σ = 3970659924. Its totient is φ = 662421504.

The previous prime is 1656056299. The next prime is 1656056329. The reversal of 1656056320 is 236506561.

It can be written as a sum of positive squares in 2 ways, for example, as 1611540736 + 44515584 = 40144^2 + 6672^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1656056329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320889 + ... + 326008.

Almost surely, 2^1656056320 is an apocalyptic number.

1656056320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656056320 is an abundant number, since it is smaller than the sum of its proper divisors (2314603604).

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

1656056320 is an frugal number, since it uses more digits than its factorization.

1656056320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646920 (or 646904 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1656056320 is about 40694.6718871156. The cubic root of 1656056320 is about 1183.1097520236.

The spelling of 1656056320 in words is "one billion, six hundred fifty-six million, fifty-six thousand, three hundred twenty".