1557165500 has 48 divisors (see below), whose sum is σ = 3710030688. Its totient is φ = 566240000.

The previous prime is 1557165499. The next prime is 1557165517. The reversal of 1557165500 is 55617551.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 136061 + ... + 147060.

It is an arithmetic number, because the mean of its divisors is an integer number (77292306).

Almost surely, 2^1557165500 is an apocalyptic number.

1557165500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1557165500 is an abundant number, since it is smaller than the sum of its proper divisors (2152865188).

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

1557165500 is a wasteful number, since it uses less digits than its factorization.

1557165500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283151 (or 283139 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 35.

The square root of 1557165500 is about 39460.9363801722. The cubic root of 1557165500 is about 1159.0751397433.

The spelling of 1557165500 in words is "one billion, five hundred fifty-seven million, one hundred sixty-five thousand, five hundred".