1557327968 has 24 divisors (see below), whose sum is σ = 3503988432. Its totient is φ = 667426176.

The previous prime is 1557327949. The next prime is 1557327973. The reversal of 1557327968 is 8697237551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475955 + ... + 3476402.

It is an arithmetic number, because the mean of its divisors is an integer number (145999518).

Almost surely, 2^1557327968 is an apocalyptic number.

It is an amenable number.

1557327968 is an abundant number, since it is smaller than the sum of its proper divisors (1946660464).

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

1557327968 is an equidigital number, since it uses as much as digits as its factorization.

1557327968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952374 (or 6952366 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 53.

The square root of 1557327968 is about 39462.9949192912. The cubic root of 1557327968 is about 1159.1154493252.

The spelling of 1557327968 in words is "one billion, five hundred fifty-seven million, three hundred twenty-seven thousand, nine hundred sixty-eight".