2556335365 has 16 divisors (see below), whose sum is σ = 3168761328. Its totient is φ = 1978269696.

The previous prime is 2556335359. The next prime is 2556335377. The reversal of 2556335365 is 5635336552.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 62631396 + 2493703969 = 7914^2 + 49937^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556335365 - 2⁹ = 2556334853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7932 + ... + 71941.

It is an arithmetic number, because the mean of its divisors is an integer number (198047583).

Almost surely, 2^2556335365 is an apocalyptic number.

It is an amenable number.

2556335365 is a deficient number, since it is larger than the sum of its proper divisors (612425963).

2556335365 is a wasteful number, since it uses less digits than its factorization.

2556335365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80088.

The product of its digits is 1215000, while the sum is 43.

The square root of 2556335365 is about 50560.2152388615. The cubic root of 2556335365 is about 1367.3276916940.

The spelling of 2556335365 in words is "two billion, five hundred fifty-six million, three hundred thirty-five thousand, three hundred sixty-five".