1557103656 has 32 divisors (see below), whose sum is σ = 4097642400. Its totient is φ = 491716800.

The previous prime is 1557103631. The next prime is 1557103663. The reversal of 1557103656 is 6563017551.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1706895 + ... + 1707806.

It is an arithmetic number, because the mean of its divisors is an integer number (128051325).

Almost surely, 2^1557103656 is an apocalyptic number.

It is an amenable number.

1557103656 is an abundant number, since it is smaller than the sum of its proper divisors (2540538744).

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

1557103656 is a wasteful number, since it uses less digits than its factorization.

1557103656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414729 (or 3414725 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 1557103656 is about 39460.1527619952. The cubic root of 1557103656 is about 1159.0597950262.

The spelling of 1557103656 in words is "one billion, five hundred fifty-seven million, one hundred three thousand, six hundred fifty-six".