1656164538 has 48 divisors (see below), whose sum is σ = 4242401280. Its totient is φ = 456871968.

The previous prime is 1656164483. The next prime is 1656164539. The reversal of 1656164538 is 8354616561.

1656164538 is a `hidden beast` number, since 1 + 6 + 56 + 1 + 64 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1656164493 and 1656164502.

It is not an unprimeable number, because it can be changed into a prime (1656164539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222970 + ... + 230277.

It is an arithmetic number, because the mean of its divisors is an integer number (88383360).

Almost surely, 2^1656164538 is an apocalyptic number.

1656164538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1656164538 is an abundant number, since it is smaller than the sum of its proper divisors (2586236742).

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

1656164538 is a wasteful number, since it uses less digits than its factorization.

1656164538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453291 (or 453288 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 1656164538 is about 40696.0014989188. The cubic root of 1656164538 is about 1183.1355222789.

The spelling of 1656164538 in words is "one billion, six hundred fifty-six million, one hundred sixty-four thousand, five hundred thirty-eight".