30818992261 has 2 divisors, whose sum is σ = 30818992262. Its totient is φ = 30818992260.

The previous prime is 30818992229. The next prime is 30818992277. The reversal of 30818992261 is 16229981803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27425347236 + 3393645025 = 165606^2 + 58255^2 .

It is a cyclic number.

It is not a de Polignac number, because 30818992261 - 2⁵ = 30818992229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30818998261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15409496130 + 15409496131.

It is an arithmetic number, because the mean of its divisors is an integer number (15409496131).

Almost surely, 2^30818992261 is an apocalyptic number.

It is an amenable number.

30818992261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30818992261 is an equidigital number, since it uses as much as digits as its factorization.

30818992261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 30818992261 in words is "thirty billion, eight hundred eighteen million, nine hundred ninety-two thousand, two hundred sixty-one".