13656729459 has 16 divisors (see below), whose sum is σ = 19351781280. Its totient is φ = 8537064960.

The previous prime is 13656729451. The next prime is 13656729487. The reversal of 13656729459 is 95492765631.

It is not a de Polignac number, because 13656729459 - 2³ = 13656729451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13656729399 and 13656729408.

It is not an unprimeable number, because it can be changed into a prime (13656729451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484012 + ... + 511449.

It is an arithmetic number, because the mean of its divisors is an integer number (1209486330).

Almost surely, 2^13656729459 is an apocalyptic number.

13656729459 is a deficient number, since it is larger than the sum of its proper divisors (5695051821).

13656729459 is a wasteful number, since it uses less digits than its factorization.

13656729459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995750.

The product of its digits is 12247200, while the sum is 57.

The spelling of 13656729459 in words is "thirteen billion, six hundred fifty-six million, seven hundred twenty-nine thousand, four hundred fifty-nine".