31839796643 has 2 divisors, whose sum is σ = 31839796644. Its totient is φ = 31839796642.

The previous prime is 31839796579. The next prime is 31839796657. The reversal of 31839796643 is 34669793813.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34669793813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31839796643 - 2⁶ = 31839796579 is a prime.

It is not a weakly prime, because it can be changed into another prime (31839796663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15919898321 + 15919898322.

It is an arithmetic number, because the mean of its divisors is an integer number (15919898322).

Almost surely, 2^31839796643 is an apocalyptic number.

31839796643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31839796643 is an equidigital number, since it uses as much as digits as its factorization.

31839796643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 59.

The spelling of 31839796643 in words is "thirty-one billion, eight hundred thirty-nine million, seven hundred ninety-six thousand, six hundred forty-three".