22761576821 has 2 divisors, whose sum is σ = 22761576822. Its totient is φ = 22761576820.

The previous prime is 22761576791. The next prime is 22761576841. The reversal of 22761576821 is 12867516722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22585881796 + 175695025 = 150286^2 + 13255^2 .

It is a cyclic number.

It is not a de Polignac number, because 22761576821 - 2³⁰ = 21687834997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22761576841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11380788410 + 11380788411.

It is an arithmetic number, because the mean of its divisors is an integer number (11380788411).

Almost surely, 2^22761576821 is an apocalyptic number.

It is an amenable number.

22761576821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22761576821 is an equidigital number, since it uses as much as digits as its factorization.

22761576821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The spelling of 22761576821 in words is "twenty-two billion, seven hundred sixty-one million, five hundred seventy-six thousand, eight hundred twenty-one".