2644122553 has 2 divisors, whose sum is σ = 2644122554. Its totient is φ = 2644122552.

The previous prime is 2644122521. The next prime is 2644122571. The reversal of 2644122553 is 3552214462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2584400569 + 59721984 = 50837^2 + 7728^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644122553 - 2⁵ = 2644122521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2644122053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322061276 + 1322061277.

It is an arithmetic number, because the mean of its divisors is an integer number (1322061277).

Almost surely, 2^2644122553 is an apocalyptic number.

It is an amenable number.

2644122553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644122553 is an equidigital number, since it uses as much as digits as its factorization.

2644122553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 34.

The square root of 2644122553 is about 51421.0322047312. The cubic root of 2644122553 is about 1382.8036805948.

The spelling of 2644122553 in words is "two billion, six hundred forty-four million, one hundred twenty-two thousand, five hundred fifty-three".