11256761566 has 16 divisors (see below), whose sum is σ = 16966403856. Its totient is φ = 5601314176.

The previous prime is 11256761561. The next prime is 11256761573. The reversal of 11256761566 is 66516765211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11256761561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966140 + ... + 1971856.

It is an arithmetic number, because the mean of its divisors is an integer number (1060400241).

Almost surely, 2^11256761566 is an apocalyptic number.

11256761566 is a deficient number, since it is larger than the sum of its proper divisors (5709642290).

11256761566 is a wasteful number, since it uses less digits than its factorization.

11256761566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10283.

The product of its digits is 453600, while the sum is 46.

The spelling of 11256761566 in words is "eleven billion, two hundred fifty-six million, seven hundred sixty-one thousand, five hundred sixty-six".