1557163960 has 128 divisors (see below), whose sum is σ = 4073068800. Its totient is φ = 529500160.

The previous prime is 1557163957. The next prime is 1557163973. The reversal of 1557163960 is 693617551.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 1338339 + ... + 1339501.

It is an arithmetic number, because the mean of its divisors is an integer number (31820850).

Almost surely, 2^1557163960 is an apocalyptic number.

1557163960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1557163960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2036534400).

1557163960 is an abundant number, since it is smaller than the sum of its proper divisors (2515904840).

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

1557163960 is a wasteful number, since it uses less digits than its factorization.

1557163960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 1557163960 is about 39460.9168671991. The cubic root of 1557163960 is about 1159.0747576438.

The spelling of 1557163960 in words is "one billion, five hundred fifty-seven million, one hundred sixty-three thousand, nine hundred sixty".