25764561265 has 8 divisors (see below), whose sum is σ = 30929169600. Its totient is φ = 20603851632.

The previous prime is 25764561239. The next prime is 25764561269. The reversal of 25764561265 is 56216546752.

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 25764561265 - 2¹⁷ = 25764430193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25764561269) 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, 960115 + ... + 986584.

It is an arithmetic number, because the mean of its divisors is an integer number (3866146200).

Almost surely, 2^25764561265 is an apocalyptic number.

It is an amenable number.

25764561265 is a deficient number, since it is larger than the sum of its proper divisors (5164608335).

25764561265 is a wasteful number, since it uses less digits than its factorization.

25764561265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949351.

The product of its digits is 3024000, while the sum is 49.

The spelling of 25764561265 in words is "twenty-five billion, seven hundred sixty-four million, five hundred sixty-one thousand, two hundred sixty-five".