13127685993 has 12 divisors (see below), whose sum is σ = 19157701108. Its totient is φ = 8661565440.

The previous prime is 13127685973. The next prime is 13127686007. The reversal of 13127685993 is 39958672131.

It can be written as a sum of positive squares in 2 ways, for example, as 3088247184 + 10039438809 = 55572^2 + 100197^2 .

It is not a de Polignac number, because 13127685993 - 2¹⁸ = 13127423849 is a prime.

It is a super-2 number, since 2×13127685993² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13127685973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7517848 + ... + 7519593.

Almost surely, 2^13127685993 is an apocalyptic number.

It is an amenable number.

13127685993 is a deficient number, since it is larger than the sum of its proper divisors (6030015115).

13127685993 is a wasteful number, since it uses less digits than its factorization.

13127685993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15037544 (or 15037541 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 13127685993 in words is "thirteen billion, one hundred twenty-seven million, six hundred eighty-five thousand, nine hundred ninety-three".