1656167980 has 12 divisors (see below), whose sum is σ = 3477952800. Its totient is φ = 662467184.

The previous prime is 1656167977. The next prime is 1656167993. The reversal of 1656167980 is 897616561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41404180 + ... + 41404219.

It is an arithmetic number, because the mean of its divisors is an integer number (289829400).

Almost surely, 2^1656167980 is an apocalyptic number.

1656167980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656167980 is an abundant number, since it is smaller than the sum of its proper divisors (1821784820).

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

1656167980 is a wasteful number, since it uses less digits than its factorization.

1656167980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82808408 (or 82808406 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1656167980 is about 40696.0437880637. The cubic root of 1656167980 is about 1183.1363419135.

The spelling of 1656167980 in words is "one billion, six hundred fifty-six million, one hundred sixty-seven thousand, nine hundred eighty".