1156565055 has 64 divisors (see below), whose sum is σ = 2031644160. Its totient is φ = 559747584.

The previous prime is 1156565041. The next prime is 1156565087. The reversal of 1156565055 is 5505656511.

It is not a de Polignac number, because 1156565055 - 2⁶ = 1156564991 is a prime.

It is a congruent number.

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, 705697 + ... + 707333.

It is an arithmetic number, because the mean of its divisors is an integer number (31744440).

Almost surely, 2^1156565055 is an apocalyptic number.

1156565055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1156565055 is a deficient number, since it is larger than the sum of its proper divisors (875079105).

1156565055 is a wasteful number, since it uses less digits than its factorization.

1156565055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its (nonzero) digits is 112500, while the sum is 39.

The square root of 1156565055 is about 34008.3086171600. The cubic root of 1156565055 is about 1049.6794350213.

The spelling of 1156565055 in words is "one billion, one hundred fifty-six million, five hundred sixty-five thousand, fifty-five".