1156641516 has 18 divisors (see below), whose sum is σ = 2923732812. Its totient is φ = 385547160.

The previous prime is 1156641469. The next prime is 1156641523. The reversal of 1156641516 is 6151466511.

1156641516 is a `hidden beast` number, since 1 + 1 + 5 + 6 + 641 + 5 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 32128931 = 1156641516 / (1 + 1 + 5 + 6 + 6 + 4 + 1 + 5 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16064430 + ... + 16064501.

Almost surely, 2^1156641516 is an apocalyptic number.

It is an amenable number.

1156641516 is an abundant number, since it is smaller than the sum of its proper divisors (1767091296).

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

1156641516 is a wasteful number, since it uses less digits than its factorization.

1156641516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32128941 (or 32128936 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1156641516 is about 34009.4327503415. The cubic root of 1156641516 is about 1049.7025660939.

The spelling of 1156641516 in words is "one billion, one hundred fifty-six million, six hundred forty-one thousand, five hundred sixteen".