31663630430357 has 2 divisors, whose sum is σ = 31663630430358. Its totient is φ = 31663630430356.

The previous prime is 31663630430291. The next prime is 31663630430381. The reversal of 31663630430357 is 75303403636613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15912328428676 + 15751302001681 = 3989026^2 + 3968791^2 .

It is a cyclic number.

It is not a de Polignac number, because 31663630430357 - 2⁸ = 31663630430101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31663630430557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831815215178 + 15831815215179.

It is an arithmetic number, because the mean of its divisors is an integer number (15831815215179).

Almost surely, 2^{31663630430357} is an apocalyptic number.

It is an amenable number.

31663630430357 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663630430357 is an equidigital number, since it uses as much as digits as its factorization.

31663630430357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 50.

The spelling of 31663630430357 in words is "thirty-one trillion, six hundred sixty-three billion, six hundred thirty million, four hundred thirty thousand, three hundred fifty-seven".