11561511706612 has 48 divisors (see below), whose sum is σ = 23148778060800. Its totient is φ = 4949417670912.

The previous prime is 11561511706573. The next prime is 11561511706631. The reversal of 11561511706612 is 21660711516511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97541688 + ... + 97660144.

It is an arithmetic number, because the mean of its divisors is an integer number (482266209600).

Almost surely, 2^{11561511706612} is an apocalyptic number.

It is an amenable number.

11561511706612 is an abundant number, since it is smaller than the sum of its proper divisors (11587266354188).

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

11561511706612 is a wasteful number, since it uses less digits than its factorization.

11561511706612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122320 (or 122318 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 43.

The spelling of 11561511706612 in words is "eleven trillion, five hundred sixty-one billion, five hundred eleven million, seven hundred six thousand, six hundred twelve".