13257294399 has 18 divisors (see below), whose sum is σ = 20342127000. Its totient is φ = 8318300736.

The previous prime is 13257294343. The next prime is 13257294409. The reversal of 13257294399 is 99349275231.

13257294399 is a `hidden beast` number, since 1 + 32 + 572 + 9 + 4 + 39 + 9 = 666.

It is not a de Polignac number, because 13257294399 - 2⁸ = 13257294143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13257294299) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2545899 + ... + 2551100.

Almost surely, 2^13257294399 is an apocalyptic number.

13257294399 is a deficient number, since it is larger than the sum of its proper divisors (7084832601).

13257294399 is a wasteful number, since it uses less digits than its factorization.

13257294399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097039 (or 5097019 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The spelling of 13257294399 in words is "thirteen billion, two hundred fifty-seven million, two hundred ninety-four thousand, three hundred ninety-nine".