12165263731 has 2 divisors, whose sum is σ = 12165263732. Its totient is φ = 12165263730.

The previous prime is 12165263723. The next prime is 12165263807. The reversal of 12165263731 is 13736256121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12165263731 - 2³ = 12165263723 is a prime.

It is a super-2 number, since 2×12165263731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12165263701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082631865 + 6082631866.

It is an arithmetic number, because the mean of its divisors is an integer number (6082631866).

Almost surely, 2^12165263731 is an apocalyptic number.

12165263731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165263731 is an equidigital number, since it uses as much as digits as its factorization.

12165263731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The spelling of 12165263731 in words is "twelve billion, one hundred sixty-five million, two hundred sixty-three thousand, seven hundred thirty-one".