11565001166431 has 2 divisors, whose sum is σ = 11565001166432. Its totient is φ = 11565001166430.

The previous prime is 11565001166419. The next prime is 11565001166443. The reversal of 11565001166431 is 13466110056511.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (11565001166419) and next prime (11565001166443).

It is a cyclic number.

It is not a de Polignac number, because 11565001166431 - 2⁵ = 11565001166399 is a prime.

It is a super-2 number, since 2×11565001166431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11565001166231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782500583215 + 5782500583216.

It is an arithmetic number, because the mean of its divisors is an integer number (5782500583216).

Almost surely, 2^{11565001166431} is an apocalyptic number.

11565001166431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565001166431 is an equidigital number, since it uses as much as digits as its factorization.

11565001166431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 11565001166431 in words is "eleven trillion, five hundred sixty-five billion, one million, one hundred sixty-six thousand, four hundred thirty-one".