1557103655 has 32 divisors (see below), whose sum is σ = 1953552384. Its totient is φ = 1190624256.

The previous prime is 1557103631. The next prime is 1557103663. The reversal of 1557103655 is 5563017551.

It is a cyclic number.

It is not a de Polignac number, because 1557103655 - 2¹⁴ = 1557087271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1891574 + ... + 1892396.

It is an arithmetic number, because the mean of its divisors is an integer number (61048512).

Almost surely, 2^1557103655 is an apocalyptic number.

1557103655 is a deficient number, since it is larger than the sum of its proper divisors (396448729).

1557103655 is an equidigital number, since it uses as much as digits as its factorization.

1557103655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 78750, while the sum is 38.

The square root of 1557103655 is about 39460.1527493242. The cubic root of 1557103655 is about 1159.0597947781.

The spelling of 1557103655 in words is "one billion, five hundred fifty-seven million, one hundred three thousand, six hundred fifty-five".