1557153345 has 64 divisors (see below), whose sum is σ = 2776965120. Its totient is φ = 738777600.

The previous prime is 1557153329. The next prime is 1557153361. The reversal of 1557153345 is 5433517551.

It is an interprime number because it is at equal distance from previous prime (1557153329) and next prime (1557153361).

It is not a de Polignac number, because 1557153345 - 2⁴ = 1557153329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1570800 + ... + 1571790.

It is an arithmetic number, because the mean of its divisors is an integer number (43390080).

Almost surely, 2^1557153345 is an apocalyptic number.

1557153345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1557153345 is a deficient number, since it is larger than the sum of its proper divisors (1219811775).

1557153345 is a wasteful number, since it uses less digits than its factorization.

1557153345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 157500, while the sum is 39.

The square root of 1557153345 is about 39460.7823668006. The cubic root of 1557153345 is about 1159.0721238800.

The spelling of 1557153345 in words is "one billion, five hundred fifty-seven million, one hundred fifty-three thousand, three hundred forty-five".