2565900761 has 8 divisors (see below), whose sum is σ = 2617273344. Its totient is φ = 2515015440.

The previous prime is 2565900703. The next prime is 2565900817. The reversal of 2565900761 is 1670095652.

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 2565900761 - 2²² = 2561706457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565900361) 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, 111170 + ... + 132251.

It is an arithmetic number, because the mean of its divisors is an integer number (327159168).

Almost surely, 2^2565900761 is an apocalyptic number.

It is an amenable number.

2565900761 is a deficient number, since it is larger than the sum of its proper divisors (51372583).

2565900761 is a wasteful number, since it uses less digits than its factorization.

2565900761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243631.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 2565900761 is about 50654.7210139391. The cubic root of 2565900761 is about 1369.0310090846.

The spelling of 2565900761 in words is "two billion, five hundred sixty-five million, nine hundred thousand, seven hundred sixty-one".