30931063961851 has 2 divisors, whose sum is σ = 30931063961852. Its totient is φ = 30931063961850.

The previous prime is 30931063961813. The next prime is 30931063961879. The reversal of 30931063961851 is 15816936013903.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30931063961851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30931063961792 and 30931063961801.

It is not a weakly prime, because it can be changed into another prime (30931063961351) 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 as a sum of consecutive naturals, namely, 15465531980925 + 15465531980926.

It is an arithmetic number, because the mean of its divisors is an integer number (15465531980926).

Almost surely, 2^{30931063961851} is an apocalyptic number.

30931063961851 is a deficient number, since it is larger than the sum of its proper divisors (1).

30931063961851 is an equidigital number, since it uses as much as digits as its factorization.

30931063961851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 30931063961851 in words is "thirty trillion, nine hundred thirty-one billion, sixty-three million, nine hundred sixty-one thousand, eight hundred fifty-one".