1268115931731 has 16 divisors (see below), whose sum is σ = 1844563368960. Its totient is φ = 768542149920.

The previous prime is 1268115931669. The next prime is 1268115931777. The reversal of 1268115931731 is 1371395118621.

It is not a de Polignac number, because 1268115931731 - 2⁷ = 1268115931603 is a prime.

It is a super-2 number, since 2×1268115931731² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1268115931781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1887966 + ... + 2469948.

It is an arithmetic number, because the mean of its divisors is an integer number (115285210560).

Almost surely, 2^{1268115931731} is an apocalyptic number.

1268115931731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1268115931731 is a deficient number, since it is larger than the sum of its proper divisors (576447437229).

1268115931731 is a wasteful number, since it uses less digits than its factorization.

1268115931731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648026.

The product of its digits is 272160, while the sum is 48.

The spelling of 1268115931731 in words is "one trillion, two hundred sixty-eight billion, one hundred fifteen million, nine hundred thirty-one thousand, seven hundred thirty-one".