622656432361261 has 2 divisors, whose sum is σ = 622656432361262. Its totient is φ = 622656432361260.

The previous prime is 622656432361241. The next prime is 622656432361321. The reversal of 622656432361261 is 162163234656226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405383231125161 + 217273201236100 = 20134131^2 + 14740190^2 .

It is a cyclic number.

It is not a de Polignac number, because 622656432361261 - 2²¹ = 622656430264109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622656432361241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311328216180630 + 311328216180631.

It is an arithmetic number, because the mean of its divisors is an integer number (311328216180631).

Almost surely, 2^{622656432361261} is an apocalyptic number.

It is an amenable number.

622656432361261 is a deficient number, since it is larger than the sum of its proper divisors (1).

622656432361261 is an equidigital number, since it uses as much as digits as its factorization.

622656432361261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 55.

The spelling of 622656432361261 in words is "six hundred twenty-two trillion, six hundred fifty-six billion, four hundred thirty-two million, three hundred sixty-one thousand, two hundred sixty-one".