2645456357 has 16 divisors (see below), whose sum is σ = 2787076080. Its totient is φ = 2507366400.

The previous prime is 2645456353. The next prime is 2645456369. The reversal of 2645456357 is 7536545462.

It is a Cunningham number, because it is equal to 51434²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 48636676 + 2596819681 = 6974^2 + 50959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645456357 - 2² = 2645456353 is a prime.

It is a super-2 number, since 2×2645456357² = 13996878673583422898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645456353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1132763 + ... + 1135095.

It is an arithmetic number, because the mean of its divisors is an integer number (174192255).

Almost surely, 2^2645456357 is an apocalyptic number.

It is an amenable number.

2645456357 is a deficient number, since it is larger than the sum of its proper divisors (141619723).

2645456357 is a wasteful number, since it uses less digits than its factorization.

2645456357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064.

The product of its digits is 3024000, while the sum is 47.

The square root of 2645456357 is about 51434.0000097212. Note that the first 5 decimals coincide. The cubic root of 2645456357 is about 1383.0361558302.

The spelling of 2645456357 in words is "two billion, six hundred forty-five million, four hundred fifty-six thousand, three hundred fifty-seven".