1557123116 has 24 divisors (see below), whose sum is σ = 2749469184. Its totient is φ = 771577040.

The previous prime is 1557123083. The next prime is 1557123119. The reversal of 1557123116 is 6113217551.

It is not an unprimeable number, because it can be changed into a prime (1557123119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513581 + ... + 516603.

It is an arithmetic number, because the mean of its divisors is an integer number (114561216).

Almost surely, 2^1557123116 is an apocalyptic number.

It is an amenable number.

1557123116 is a deficient number, since it is larger than the sum of its proper divisors (1192346068).

1557123116 is a wasteful number, since it uses less digits than its factorization.

1557123116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141 (or 4139 counting only the distinct ones).

The product of its digits is 6300, while the sum is 32.

The square root of 1557123116 is about 39460.3993390842. The cubic root of 1557123116 is about 1159.0646234801.

The spelling of 1557123116 in words is "one billion, five hundred fifty-seven million, one hundred twenty-three thousand, one hundred sixteen".