22778743697 has 2 divisors, whose sum is σ = 22778743698. Its totient is φ = 22778743696.

The previous prime is 22778743679. The next prime is 22778743699. The reversal of 22778743697 is 79634787722.

Together with previous prime (22778743679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15083769856 + 7694973841 = 122816^2 + 87721^2 .

It is a cyclic number.

It is not a de Polignac number, because 22778743697 - 2¹⁰ = 22778742673 is a prime.

Together with 22778743699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22778743699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389371848 + 11389371849.

It is an arithmetic number, because the mean of its divisors is an integer number (11389371849).

Almost surely, 2^22778743697 is an apocalyptic number.

It is an amenable number.

22778743697 is a deficient number, since it is larger than the sum of its proper divisors (1).

22778743697 is an equidigital number, since it uses as much as digits as its factorization.

22778743697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49787136, while the sum is 62.

The spelling of 22778743697 in words is "twenty-two billion, seven hundred seventy-eight million, seven hundred forty-three thousand, six hundred ninety-seven".