11161565616 has 20 divisors (see below), whose sum is σ = 28834044632. Its totient is φ = 3720521856.

The previous prime is 11161565567. The next prime is 11161565629. The reversal of 11161565616 is 61656516111.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116266261 + ... + 116266356.

Almost surely, 2^11161565616 is an apocalyptic number.

11161565616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11161565616 is an abundant number, since it is smaller than the sum of its proper divisors (17672479016).

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

11161565616 is a wasteful number, since it uses less digits than its factorization.

11161565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232532628 (or 232532622 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The spelling of 11161565616 in words is "eleven billion, one hundred sixty-one million, five hundred sixty-five thousand, six hundred sixteen".