31661241453359 has 4 divisors (see below), whose sum is σ = 36184275946704. Its totient is φ = 27138206960016.

The previous prime is 31661241453203. The next prime is 31661241453371. The reversal of 31661241453359 is 95335414216613.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31661241453359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31661241453359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31661241453379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261517246662 + ... + 2261517246675.

It is an arithmetic number, because the mean of its divisors is an integer number (9046068986676).

Almost surely, 2^{31661241453359} is an apocalyptic number.

31661241453359 is a deficient number, since it is larger than the sum of its proper divisors (4523034493345).

31661241453359 is an equidigital number, since it uses as much as digits as its factorization.

31661241453359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523034493344.

The product of its digits is 6998400, while the sum is 53.

The spelling of 31661241453359 in words is "thirty-one trillion, six hundred sixty-one billion, two hundred forty-one million, four hundred fifty-three thousand, three hundred fifty-nine".