22777750549 has 2 divisors, whose sum is σ = 22777750550. Its totient is φ = 22777750548.

The previous prime is 22777750423. The next prime is 22777750573. The reversal of 22777750549 is 94505777722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22584679524 + 193071025 = 150282^2 + 13895^2 .

It is a cyclic number.

It is not a de Polignac number, because 22777750549 - 2⁷ = 22777750421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22777750549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22777750349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11388875274 + 11388875275.

It is an arithmetic number, because the mean of its divisors is an integer number (11388875275).

Almost surely, 2^22777750549 is an apocalyptic number.

It is an amenable number.

22777750549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22777750549 is an equidigital number, since it uses as much as digits as its factorization.

22777750549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8643600, while the sum is 55.

The spelling of 22777750549 in words is "twenty-two billion, seven hundred seventy-seven million, seven hundred fifty thousand, five hundred forty-nine".