12365509957 has 4 divisors (see below), whose sum is σ = 12653080000. Its totient is φ = 12077939916.

The previous prime is 12365509943. The next prime is 12365509967. The reversal of 12365509957 is 75990556321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75990556321 = 2087 ⋅36411383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12365509957 is a prime.

It is a super-2 number, since 2×12365509957² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12365509907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143784957 + ... + 143785042.

It is an arithmetic number, because the mean of its divisors is an integer number (3163270000).

Almost surely, 2^12365509957 is an apocalyptic number.

It is an amenable number.

12365509957 is a deficient number, since it is larger than the sum of its proper divisors (287570043).

12365509957 is an equidigital number, since it uses as much as digits as its factorization.

12365509957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287570042.

The product of its (nonzero) digits is 2551500, while the sum is 52.

The spelling of 12365509957 in words is "twelve billion, three hundred sixty-five million, five hundred nine thousand, nine hundred fifty-seven".