31860813455983 has 2 divisors, whose sum is σ = 31860813455984. Its totient is φ = 31860813455982.

The previous prime is 31860813455921. The next prime is 31860813456019. The reversal of 31860813455983 is 38955431806813.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31860813455983 is a prime.

It is a super-2 number, since 2×31860813455983² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31860813455903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15930406727991 + 15930406727992.

It is an arithmetic number, because the mean of its divisors is an integer number (15930406727992).

Almost surely, 2^{31860813455983} is an apocalyptic number.

31860813455983 is a deficient number, since it is larger than the sum of its proper divisors (1).

31860813455983 is an equidigital number, since it uses as much as digits as its factorization.

31860813455983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74649600, while the sum is 64.

The spelling of 31860813455983 in words is "thirty-one trillion, eight hundred sixty billion, eight hundred thirteen million, four hundred fifty-five thousand, nine hundred eighty-three".