1557664315 has 16 divisors (see below), whose sum is σ = 1890725760. Its totient is φ = 1231810560.

The previous prime is 1557664309. The next prime is 1557664343. The reversal of 1557664315 is 5134667551.

It is not a de Polignac number, because 1557664315 - 2⁷ = 1557664187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595731 + ... + 598339.

It is an arithmetic number, because the mean of its divisors is an integer number (118170360).

Almost surely, 2^1557664315 is an apocalyptic number.

1557664315 is a deficient number, since it is larger than the sum of its proper divisors (333061445).

1557664315 is a wasteful number, since it uses less digits than its factorization.

1557664315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942.

The product of its digits is 378000, while the sum is 43.

The square root of 1557664315 is about 39467.2562385581. The cubic root of 1557664315 is about 1159.1988907386.

The spelling of 1557664315 in words is "one billion, five hundred fifty-seven million, six hundred sixty-four thousand, three hundred fifteen".