12665604120435 has 128 divisors (see below), whose sum is σ = 26102209996800. Its totient is φ = 5707459584000.

The previous prime is 12665604120307. The next prime is 12665604120479. The reversal of 12665604120435 is 53402140656621.

12665604120435 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 5 + 604 + 1 + 2 + 0 + 4 + 35 = 666.

It is not a de Polignac number, because 12665604120435 - 2⁷ = 12665604120307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22732671 + ... + 23283159.

It is an arithmetic number, because the mean of its divisors is an integer number (203923515600).

Almost surely, 2^{12665604120435} is an apocalyptic number.

12665604120435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12665604120435 is an abundant number, since it is smaller than the sum of its proper divisors (13436605876365).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12665604120435 is a wasteful number, since it uses less digits than its factorization.

12665604120435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550858 (or 550852 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 12665604120435 in words is "twelve trillion, six hundred sixty-five billion, six hundred four million, one hundred twenty thousand, four hundred thirty-five".