306136804261 has 2 divisors, whose sum is σ = 306136804262. Its totient is φ = 306136804260.

The previous prime is 306136804223. The next prime is 306136804291. The reversal of 306136804261 is 162408631603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232787915361 + 73348888900 = 482481^2 + 270830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306136804261 is a prime.

It is a super-2 number, since 2×306136804261² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306136804291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153068402130 + 153068402131.

It is an arithmetic number, because the mean of its divisors is an integer number (153068402131).

Almost surely, 2^306136804261 is an apocalyptic number.

It is an amenable number.

306136804261 is a deficient number, since it is larger than the sum of its proper divisors (1).

306136804261 is an equidigital number, since it uses as much as digits as its factorization.

306136804261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 306136804261 in words is "three hundred six billion, one hundred thirty-six million, eight hundred four thousand, two hundred sixty-one".