11566172741 has 2 divisors, whose sum is σ = 11566172742. Its totient is φ = 11566172740.

The previous prime is 11566172701. The next prime is 11566172831. The reversal of 11566172741 is 14727166511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11566142116 + 30625 = 107546^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 11566172741 - 2⁶ = 11566172677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11566172701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783086370 + 5783086371.

It is an arithmetic number, because the mean of its divisors is an integer number (5783086371).

Almost surely, 2^11566172741 is an apocalyptic number.

It is an amenable number.

11566172741 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566172741 is an equidigital number, since it uses as much as digits as its factorization.

11566172741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The spelling of 11566172741 in words is "eleven billion, five hundred sixty-six million, one hundred seventy-two thousand, seven hundred forty-one".