11561377216 has 14 divisors (see below), whose sum is σ = 22942108040. Its totient is φ = 5780688576.

The previous prime is 11561377207. The next prime is 11561377253. The reversal of 11561377216 is 61277316511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90323196 + ... + 90323323.

Almost surely, 2^11561377216 is an apocalyptic number.

11561377216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11561377216 is a deficient number, since it is larger than the sum of its proper divisors (11380730824).

11561377216 is an equidigital number, since it uses as much as digits as its factorization.

11561377216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180646531 (or 180646521 counting only the distinct ones).

The product of its digits is 52920, while the sum is 40.

The spelling of 11561377216 in words is "eleven billion, five hundred sixty-one million, three hundred seventy-seven thousand, two hundred sixteen".