22678256261 has 2 divisors, whose sum is σ = 22678256262. Its totient is φ = 22678256260.

The previous prime is 22678256233. The next prime is 22678256267. The reversal of 22678256261 is 16265287622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12795908161 + 9882348100 = 113119^2 + 99410^2 .

It is a cyclic number.

It is not a de Polignac number, because 22678256261 - 2¹⁴ = 22678239877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22678256267) 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, 11339128130 + 11339128131.

It is an arithmetic number, because the mean of its divisors is an integer number (11339128131).

Almost surely, 2^22678256261 is an apocalyptic number.

It is an amenable number.

22678256261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22678256261 is an equidigital number, since it uses as much as digits as its factorization.

22678256261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 47.

It can be divided in two parts, 2267 and 8256261, that added together give a palindrome (8258528).

The spelling of 22678256261 in words is "twenty-two billion, six hundred seventy-eight million, two hundred fifty-six thousand, two hundred sixty-one".