22155747749 has 2 divisors, whose sum is σ = 22155747750. Its totient is φ = 22155747748.

The previous prime is 22155747727. The next prime is 22155747793. The reversal of 22155747749 is 94774755122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14836945249 + 7318802500 = 121807^2 + 85550^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155747749 - 2²⁰ = 22154699173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22155747749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155747799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077873874 + 11077873875.

It is an arithmetic number, because the mean of its divisors is an integer number (11077873875).

Almost surely, 2^22155747749 is an apocalyptic number.

It is an amenable number.

22155747749 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155747749 is an equidigital number, since it uses as much as digits as its factorization.

22155747749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4939200, while the sum is 53.

The spelling of 22155747749 in words is "twenty-two billion, one hundred fifty-five million, seven hundred forty-seven thousand, seven hundred forty-nine".