13129523456 has 36 divisors (see below), whose sum is σ = 29951729472. Its totient is φ = 5626937856.

The previous prime is 13129523441. The next prime is 13129523497. The reversal of 13129523456 is 65432592131.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3661580 + ... + 3665163.

Almost surely, 2^13129523456 is an apocalyptic number.

13129523456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13129523456 is an abundant number, since it is smaller than the sum of its proper divisors (16822206016).

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

13129523456 is an frugal number, since it uses more digits than its factorization.

13129523456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326766 (or 7326752 counting only the distinct ones).

The product of its digits is 194400, while the sum is 41.

The spelling of 13129523456 in words is "thirteen billion, one hundred twenty-nine million, five hundred twenty-three thousand, four hundred fifty-six".