12640235455 has 16 divisors (see below), whose sum is σ = 15354612000. Its totient is φ = 9988721280.

The previous prime is 12640235449. The next prime is 12640235459. The reversal of 12640235455 is 55453204621.

It is not a de Polignac number, because 12640235455 - 2²⁵ = 12606681023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640235459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87976 + ... + 181714.

It is an arithmetic number, because the mean of its divisors is an integer number (959663250).

Almost surely, 2^12640235455 is an apocalyptic number.

12640235455 is a deficient number, since it is larger than the sum of its proper divisors (2714376545).

12640235455 is a wasteful number, since it uses less digits than its factorization.

12640235455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94074.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 12640235455 in words is "twelve billion, six hundred forty million, two hundred thirty-five thousand, four hundred fifty-five".