22978992791 has 2 divisors, whose sum is σ = 22978992792. Its totient is φ = 22978992790.

The previous prime is 22978992767. The next prime is 22978992793. The reversal of 22978992791 is 19729987922.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22978992791 is a prime.

It is a Sophie Germain prime.

Together with 22978992793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22978992793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11489496395 + 11489496396.

It is an arithmetic number, because the mean of its divisors is an integer number (11489496396).

Almost surely, 2^22978992791 is an apocalyptic number.

22978992791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22978992791 is an equidigital number, since it uses as much as digits as its factorization.

22978992791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 65.

The spelling of 22978992791 in words is "twenty-two billion, nine hundred seventy-eight million, nine hundred ninety-two thousand, seven hundred ninety-one".