1156665516 has 24 divisors (see below), whose sum is σ = 2857644720. Its totient is φ = 362875392.

The previous prime is 1156665511. The next prime is 1156665529. The reversal of 1156665516 is 6155666511.

It is not an unprimeable number, because it can be changed into a prime (1156665511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2834761 + ... + 2835168.

It is an arithmetic number, because the mean of its divisors is an integer number (119068530).

Almost surely, 2^1156665516 is an apocalyptic number.

It is an amenable number.

1156665516 is an abundant number, since it is smaller than the sum of its proper divisors (1700979204).

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

1156665516 is a wasteful number, since it uses less digits than its factorization.

1156665516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669953 (or 5669951 counting only the distinct ones).

The product of its digits is 162000, while the sum is 42.

The square root of 1156665516 is about 34009.7855917970. The cubic root of 1156665516 is about 1049.7098263922.

The spelling of 1156665516 in words is "one billion, one hundred fifty-six million, six hundred sixty-five thousand, five hundred sixteen".