2645426557 has 2 divisors, whose sum is σ = 2645426558. Its totient is φ = 2645426556.

The previous prime is 2645426543. The next prime is 2645426561. The reversal of 2645426557 is 7556245462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2510611236 + 134815321 = 50106^2 + 11611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645426557 - 2¹⁹ = 2644902269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645426527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322713278 + 1322713279.

It is an arithmetic number, because the mean of its divisors is an integer number (1322713279).

Almost surely, 2^2645426557 is an apocalyptic number.

It is an amenable number.

2645426557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645426557 is an equidigital number, since it uses as much as digits as its factorization.

2645426557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016000, while the sum is 46.

The square root of 2645426557 is about 51433.7103172618. The cubic root of 2645426557 is about 1383.0309626957.

The spelling of 2645426557 in words is "two billion, six hundred forty-five million, four hundred twenty-six thousand, five hundred fifty-seven".