2565026261 has 8 divisors (see below), whose sum is σ = 2938079424. Its totient is φ = 2193628320.

The previous prime is 2565026257. The next prime is 2565026267. The reversal of 2565026261 is 1626205652.

2565026261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2565026261 - 2² = 2565026257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565026267) 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, 410480 + ... + 416681.

It is an arithmetic number, because the mean of its divisors is an integer number (367259928).

Almost surely, 2^2565026261 is an apocalyptic number.

It is an amenable number.

2565026261 is a deficient number, since it is larger than the sum of its proper divisors (373053163).

2565026261 is an equidigital number, since it uses as much as digits as its factorization.

2565026261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827611.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2565026261 is about 50646.0883089701. The cubic root of 2565026261 is about 1368.8754621941.

The spelling of 2565026261 in words is "two billion, five hundred sixty-five million, twenty-six thousand, two hundred sixty-one".