12665231535 has 96 divisors (see below), whose sum is σ = 23092332480. Its totient is φ = 5918330880.

The previous prime is 12665231507. The next prime is 12665231581. The reversal of 12665231535 is 53513256621.

It is not a de Polignac number, because 12665231535 - 2⁵ = 12665231503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12665231493 and 12665231502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7587681 + ... + 7589349.

It is an arithmetic number, because the mean of its divisors is an integer number (240545130).

Almost surely, 2^12665231535 is an apocalyptic number.

12665231535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12665231535 is a deficient number, since it is larger than the sum of its proper divisors (10427100945).

12665231535 is a wasteful number, since it uses less digits than its factorization.

12665231535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1838 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

The spelling of 12665231535 in words is "twelve billion, six hundred sixty-five million, two hundred thirty-one thousand, five hundred thirty-five".