11566157623 has 2 divisors, whose sum is σ = 11566157624. Its totient is φ = 11566157622.

The previous prime is 11566157597. The next prime is 11566157633. The reversal of 11566157623 is 32675166511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11566157623 - 2²¹ = 11564060471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11566157623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11566157633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5783078811 + 5783078812.

It is an arithmetic number, because the mean of its divisors is an integer number (5783078812).

Almost surely, 2^11566157623 is an apocalyptic number.

11566157623 is a deficient number, since it is larger than the sum of its proper divisors (1).

11566157623 is an equidigital number, since it uses as much as digits as its factorization.

11566157623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The spelling of 11566157623 in words is "eleven billion, five hundred sixty-six million, one hundred fifty-seven thousand, six hundred twenty-three".