31368261869 has 16 divisors (see below), whose sum is σ = 38539161600. Its totient is φ = 24930010224.

The previous prime is 31368261851. The next prime is 31368261877. The reversal of 31368261869 is 96816286313.

It is not a de Polignac number, because 31368261869 - 2²⁴ = 31351484653 is a prime.

It is a super-2 number, since 2×31368261869² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31368261869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31368261809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2502809 + ... + 2515310.

It is an arithmetic number, because the mean of its divisors is an integer number (2408697600).

Almost surely, 2^31368261869 is an apocalyptic number.

It is an amenable number.

31368261869 is a deficient number, since it is larger than the sum of its proper divisors (7170899731).

31368261869 is a wasteful number, since it uses less digits than its factorization.

31368261869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018192.

The product of its digits is 2239488, while the sum is 53.

The spelling of 31368261869 in words is "thirty-one billion, three hundred sixty-eight million, two hundred sixty-one thousand, eight hundred sixty-nine".