31368638361 has 16 divisors (see below), whose sum is σ = 42265791360. Its totient is φ = 20692291200.

The previous prime is 31368638359. The next prime is 31368638363. The reversal of 31368638361 is 16383686313.

It is an interprime number because it is at equal distance from previous prime (31368638359) and next prime (31368638363).

It is not a de Polignac number, because 31368638361 - 2¹ = 31368638359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31368638361.

It is not an unprimeable number, because it can be changed into a prime (31368638363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338461 + ... + 421061.

It is an arithmetic number, because the mean of its divisors is an integer number (2641611960).

Almost surely, 2^31368638361 is an apocalyptic number.

It is an amenable number.

31368638361 is a deficient number, since it is larger than the sum of its proper divisors (10897152999).

31368638361 is a wasteful number, since it uses less digits than its factorization.

31368638361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83936.

The product of its digits is 1119744, while the sum is 48.

The spelling of 31368638361 in words is "thirty-one billion, three hundred sixty-eight million, six hundred thirty-eight thousand, three hundred sixty-one".