2645456369 has 2 divisors, whose sum is σ = 2645456370. Its totient is φ = 2645456368.

The previous prime is 2645456353. The next prime is 2645456371. The reversal of 2645456369 is 9636545462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2623488400 + 21967969 = 51220^2 + 4687^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645456369 - 2⁴ = 2645456353 is a prime.

It is a super-2 number, since 2×2645456369² = 13996878800565328322, which contains 22 as substring.

Together with 2645456371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2645456069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322728184 + 1322728185.

It is an arithmetic number, because the mean of its divisors is an integer number (1322728185).

Almost surely, 2^2645456369 is an apocalyptic number.

It is an amenable number.

2645456369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645456369 is an equidigital number, since it uses as much as digits as its factorization.

2645456369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 50.

The square root of 2645456369 is about 51434.0001263755. Note that the first 3 decimals coincide. The cubic root of 2645456369 is about 1383.0361579214.

The spelling of 2645456369 in words is "two billion, six hundred forty-five million, four hundred fifty-six thousand, three hundred sixty-nine".