1557903164 has 6 divisors (see below), whose sum is σ = 2726330544. Its totient is φ = 778951580.

The previous prime is 1557903163. The next prime is 1557903187. The reversal of 1557903164 is 4613097551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557903163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194737892 + ... + 194737899.

It is an arithmetic number, because the mean of its divisors is an integer number (454388424).

Almost surely, 2^1557903164 is an apocalyptic number.

It is an amenable number.

1557903164 is a deficient number, since it is larger than the sum of its proper divisors (1168427380).

1557903164 is a wasteful number, since it uses less digits than its factorization.

1557903164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389475795 (or 389475793 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1557903164 is about 39470.2820359825. The cubic root of 1557903164 is about 1159.2581374245.

The spelling of 1557903164 in words is "one billion, five hundred fifty-seven million, nine hundred three thousand, one hundred sixty-four".