2565817026 has 32 divisors (see below), whose sum is σ = 5455797120. Its totient is φ = 802648704.

The previous prime is 2565816991. The next prime is 2565817031. The reversal of 2565817026 is 6207185652.

It is a super-2 number, since 2×2565817026² = 13166834021822969352, which contains 22 as substring.

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, 168091 + ... + 182718.

It is an arithmetic number, because the mean of its divisors is an integer number (170493660).

Almost surely, 2^2565817026 is an apocalyptic number.

2565817026 is an abundant number, since it is smaller than the sum of its proper divisors (2889980094).

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

2565817026 is a wasteful number, since it uses less digits than its factorization.

2565817026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350890.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 2565817026 is about 50653.8944800891. The cubic root of 2565817026 is about 1369.0161167109.

The spelling of 2565817026 in words is "two billion, five hundred sixty-five million, eight hundred seventeen thousand, twenty-six".