13129523457 has 8 divisors (see below), whose sum is σ = 17535554784. Its totient is φ = 8738253888.

The previous prime is 13129523441. The next prime is 13129523497. The reversal of 13129523457 is 75432592131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13129523457 - 2⁴ = 13129523441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13129523437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3688363 + ... + 3691920.

It is an arithmetic number, because the mean of its divisors is an integer number (2191944348).

Almost surely, 2^13129523457 is an apocalyptic number.

It is an amenable number.

13129523457 is a deficient number, since it is larger than the sum of its proper divisors (4406031327).

13129523457 is an equidigital number, since it uses as much as digits as its factorization.

13129523457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7380879.

The product of its digits is 226800, while the sum is 42.

The spelling of 13129523457 in words is "thirteen billion, one hundred twenty-nine million, five hundred twenty-three thousand, four hundred fifty-seven".