2565380409 has 8 divisors (see below), whose sum is σ = 3424048320. Its totient is φ = 1708483056.

The previous prime is 2565380407. The next prime is 2565380429. The reversal of 2565380409 is 9040835652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2565380409 - 2¹ = 2565380407 is a prime.

It is a super-5 number, since 5×2565380409⁵ (a number of 48 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (2565380407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439254 + ... + 445055.

It is an arithmetic number, because the mean of its divisors is an integer number (428006040).

Almost surely, 2^2565380409 is an apocalyptic number.

It is an amenable number.

2565380409 is a deficient number, since it is larger than the sum of its proper divisors (858667911).

2565380409 is an equidigital number, since it uses as much as digits as its factorization.

2565380409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885279.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 2565380409 is about 50649.5844899048. The cubic root of 2565380409 is about 1368.9384585859.

The spelling of 2565380409 in words is "two billion, five hundred sixty-five million, three hundred eighty thousand, four hundred nine".