1157715555 has 16 divisors (see below), whose sum is σ = 1961306784. Its totient is φ = 581127680.

The previous prime is 1157715539. The next prime is 1157715577. The reversal of 1157715555 is 5555177511.

It is a happy number.

It is not a de Polignac number, because 1157715555 - 2⁴ = 1157715539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2269776 + ... + 2270285.

It is an arithmetic number, because the mean of its divisors is an integer number (122581674).

Almost surely, 2^1157715555 is an apocalyptic number.

1157715555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1157715555 is a deficient number, since it is larger than the sum of its proper divisors (803591229).

1157715555 is a wasteful number, since it uses less digits than its factorization.

1157715555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540086.

The product of its digits is 153125, while the sum is 42.

The square root of 1157715555 is about 34025.2193967945. The cubic root of 1157715555 is about 1050.0273779709.

The spelling of 1157715555 in words is "one billion, one hundred fifty-seven million, seven hundred fifteen thousand, five hundred fifty-five".