13168516731 has 12 divisors (see below), whose sum is σ = 17730186408. Its totient is φ = 8693757024.

The previous prime is 13168516679. The next prime is 13168516763. The reversal of 13168516731 is 13761586131.

It is not a de Polignac number, because 13168516731 - 2⁶ = 13168516667 is a prime.

It is a super-2 number, since 2×13168516731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13168516831) 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, 175050 + ... + 238703.

It is an arithmetic number, because the mean of its divisors is an integer number (1477515534).

Almost surely, 2^13168516731 is an apocalyptic number.

13168516731 is a deficient number, since it is larger than the sum of its proper divisors (4561669677).

13168516731 is an equidigital number, since it uses as much as digits as its factorization.

13168516731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413962 (or 413859 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The spelling of 13168516731 in words is "thirteen billion, one hundred sixty-eight million, five hundred sixteen thousand, seven hundred thirty-one".