1557565156 has 27 divisors (see below), whose sum is σ = 3171882819. Its totient is φ = 667291128.

The previous prime is 1557565123. The next prime is 1557565159. The reversal of 1557565156 is 6515657551.

The square root of 1557565156 is 39466.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (1557565159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 551115 + ... + 553933.

Almost surely, 2^1557565156 is an apocalyptic number.

1557565156 is the 39466-th square number.

It is an amenable number.

1557565156 is an abundant number, since it is smaller than the sum of its proper divisors (1614317663).

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

1557565156 is an frugal number, since it uses more digits than its factorization.

1557565156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656 (or 2828 counting only the distinct ones).

The product of its digits is 787500, while the sum is 46.

The cubic root of 1557565156 is about 1159.1742924900.

The spelling of 1557565156 in words is "one billion, five hundred fifty-seven million, five hundred sixty-five thousand, one hundred fifty-six".