400304611261 has 2 divisors, whose sum is σ = 400304611262. Its totient is φ = 400304611260.

The previous prime is 400304611219. The next prime is 400304611303. The reversal of 400304611261 is 162116403004.

It is a balanced prime because it is at equal distance from previous prime (400304611219) and next prime (400304611303).

It can be written as a sum of positive squares in only one way, i.e., 400206799161 + 97812100 = 632619^2 + 9890^2 .

It is a cyclic number.

It is not a de Polignac number, because 400304611261 - 2³³ = 391714676669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400304611211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200152305630 + 200152305631.

It is an arithmetic number, because the mean of its divisors is an integer number (200152305631).

Almost surely, 2^400304611261 is an apocalyptic number.

It is an amenable number.

400304611261 is a deficient number, since it is larger than the sum of its proper divisors (1).

400304611261 is an equidigital number, since it uses as much as digits as its factorization.

400304611261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 400304611261 in words is "four hundred billion, three hundred four million, six hundred eleven thousand, two hundred sixty-one".