15726945013 has 4 divisors (see below), whose sum is σ = 16936710028. Its totient is φ = 14517180000.

The previous prime is 15726945007. The next prime is 15726945023. The reversal of 15726945013 is 31054962751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3841148529 + 11885796484 = 61977^2 + 109022^2 .

It is a cyclic number.

It is not a de Polignac number, because 15726945013 - 2³³ = 7137010421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15726945023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604882488 + ... + 604882513.

It is an arithmetic number, because the mean of its divisors is an integer number (4234177507).

Almost surely, 2^15726945013 is an apocalyptic number.

15726945013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15726945013 is a deficient number, since it is larger than the sum of its proper divisors (1209765015).

15726945013 is a wasteful number, since it uses less digits than its factorization.

15726945013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209765014.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 15726945013 in words is "fifteen billion, seven hundred twenty-six million, nine hundred forty-five thousand, thirteen".