12561193827888 has 160 divisors (see below), whose sum is σ = 33726691353600. Its totient is φ = 4025340211200.

The previous prime is 12561193827887. The next prime is 12561193827961. The reversal of 12561193827888 is 88872839116521.

It is not an unprimeable number, because it can be changed into a prime (12561193827883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284883348 + ... + 284927436.

It is an arithmetic number, because the mean of its divisors is an integer number (210791820960).

Almost surely, 2^{12561193827888} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12561193827888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16863345676800).

12561193827888 is an abundant number, since it is smaller than the sum of its proper divisors (21165497525712).

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

12561193827888 is a wasteful number, since it uses less digits than its factorization.

12561193827888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46251 (or 46245 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 69.

The spelling of 12561193827888 in words is "twelve trillion, five hundred sixty-one billion, one hundred ninety-three million, eight hundred twenty-seven thousand, eight hundred eighty-eight".