30993651457 has 2 divisors, whose sum is σ = 30993651458. Its totient is φ = 30993651456.

The previous prime is 30993651349. The next prime is 30993651503. The reversal of 30993651457 is 75415639903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17876759616 + 13116891841 = 133704^2 + 114529^2 .

It is a cyclic number.

It is not a de Polignac number, because 30993651457 - 2¹⁹ = 30993127169 is a prime.

It is not a weakly prime, because it can be changed into another prime (30993631457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15496825728 + 15496825729.

It is an arithmetic number, because the mean of its divisors is an integer number (15496825729).

Almost surely, 2^30993651457 is an apocalyptic number.

It is an amenable number.

30993651457 is a deficient number, since it is larger than the sum of its proper divisors (1).

30993651457 is an equidigital number, since it uses as much as digits as its factorization.

30993651457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 30993651457 in words is "thirty billion, nine hundred ninety-three million, six hundred fifty-one thousand, four hundred fifty-seven".