11560456787661 has 6 divisors (see below), whose sum is σ = 16698437582190. Its totient is φ = 7706971191768.

The previous prime is 11560456787657. The next prime is 11560456787687. The reversal of 11560456787661 is 16678765406511.

11560456787661 is a `hidden beast` number, since 1 + 1 + 5 + 6 + 0 + 4 + 567 + 8 + 7 + 6 + 61 = 666.

11560456787661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10671368090436 + 889088697225 = 3266706^2 + 942915^2 .

It is not a de Polignac number, because 11560456787661 - 2² = 11560456787657 is a prime.

It is a super-2 number, since 2×11560456787661² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11560456787461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642247599306 + ... + 642247599323.

It is an arithmetic number, because the mean of its divisors is an integer number (2783072930365).

Almost surely, 2^{11560456787661} is an apocalyptic number.

It is an amenable number.

11560456787661 is a deficient number, since it is larger than the sum of its proper divisors (5137980794529).

11560456787661 is a wasteful number, since it uses less digits than its factorization.

11560456787661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284495198635 (or 1284495198632 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 63.

The spelling of 11560456787661 in words is "eleven trillion, five hundred sixty billion, four hundred fifty-six million, seven hundred eighty-seven thousand, six hundred sixty-one".