22778040247 has 2 divisors, whose sum is σ = 22778040248. Its totient is φ = 22778040246.

The previous prime is 22778040203. The next prime is 22778040269. The reversal of 22778040247 is 74204087722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22778040247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22778040947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389020123 + 11389020124.

It is an arithmetic number, because the mean of its divisors is an integer number (11389020124).

Almost surely, 2^22778040247 is an apocalyptic number.

22778040247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22778040247 is an equidigital number, since it uses as much as digits as its factorization.

22778040247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 351232, while the sum is 43.

The spelling of 22778040247 in words is "twenty-two billion, seven hundred seventy-eight million, forty thousand, two hundred forty-seven".