12165263761 has 6 divisors (see below), whose sum is σ = 14151429330. Its totient is φ = 10427368896.

The previous prime is 12165263731. The next prime is 12165263807. The reversal of 12165263761 is 16736256121.

It can be written as a sum of positive squares in only one way, i.e., 12070318225 + 94945536 = 109865^2 + 9744^2 .

It is not a de Polignac number, because 12165263761 - 2⁹ = 12165263249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12165263701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124135296 + ... + 124135393.

It is an arithmetic number, because the mean of its divisors is an integer number (2358571555).

Almost surely, 2^12165263761 is an apocalyptic number.

It is an amenable number.

12165263761 is a deficient number, since it is larger than the sum of its proper divisors (1986165569).

12165263761 is an equidigital number, since it uses as much as digits as its factorization.

12165263761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248270703 (or 248270696 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The spelling of 12165263761 in words is "twelve billion, one hundred sixty-five million, two hundred sixty-three thousand, seven hundred sixty-one".