11566917125 has 8 divisors (see below), whose sum is σ = 14435512728. Its totient is φ = 9253533600.

The previous prime is 11566917083. The next prime is 11566917127. The reversal of 11566917125 is 52171966511.

It can be written as a sum of positive squares in 4 ways, for example, as 1184529889 + 10382387236 = 34417^2 + 101894^2 .

It is not a de Polignac number, because 11566917125 - 2⁸ = 11566916869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11566917127) 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, 46267544 + ... + 46267793.

It is an arithmetic number, because the mean of its divisors is an integer number (1804439091).

Almost surely, 2^11566917125 is an apocalyptic number.

It is an amenable number.

11566917125 is a deficient number, since it is larger than the sum of its proper divisors (2868595603).

11566917125 is an frugal number, since it uses more digits than its factorization.

11566917125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92535352 (or 92535342 counting only the distinct ones).

The product of its digits is 113400, while the sum is 44.

The spelling of 11566917125 in words is "eleven billion, five hundred sixty-six million, nine hundred seventeen thousand, one hundred twenty-five".