22778743679 has 2 divisors, whose sum is σ = 22778743680. Its totient is φ = 22778743678.

The previous prime is 22778743667. The next prime is 22778743697. The reversal of 22778743679 is 97634787722.

Together with next prime (22778743697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22778743679 - 2¹² = 22778739583 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22778743639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389371839 + 11389371840.

It is an arithmetic number, because the mean of its divisors is an integer number (11389371840).

Almost surely, 2^22778743679 is an apocalyptic number.

22778743679 is a deficient number, since it is larger than the sum of its proper divisors (1).

22778743679 is an equidigital number, since it uses as much as digits as its factorization.

22778743679 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 22778743679 in words is "twenty-two billion, seven hundred seventy-eight million, seven hundred forty-three thousand, six hundred seventy-nine".