2565366650 has 48 divisors (see below), whose sum is σ = 5948994240. Its totient is φ = 799593600.

The previous prime is 2565366647. The next prime is 2565366667. The reversal of 2565366650 is 566635652.

2565366650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2565366650² = 13162212097864445000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329315 + ... + 337014.

It is an arithmetic number, because the mean of its divisors is an integer number (123937380).

Almost surely, 2^2565366650 is an apocalyptic number.

2565366650 is an abundant number, since it is smaller than the sum of its proper divisors (3383627590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565366650 is a wasteful number, since it uses less digits than its factorization.

2565366650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666359 (or 666354 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 44.

The square root of 2565366650 is about 50649.4486643241. The cubic root of 2565366650 is about 1368.9360112221.

The spelling of 2565366650 in words is "two billion, five hundred sixty-five million, three hundred sixty-six thousand, six hundred fifty".