25264342565 has 32 divisors (see below), whose sum is σ = 37831034880. Its totient is φ = 15735470400.

The previous prime is 25264342561. The next prime is 25264342633. The reversal of 25264342565 is 56524346252.

It is not a de Polignac number, because 25264342565 - 2² = 25264342561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25264342561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422816 + ... + 478854.

It is an arithmetic number, because the mean of its divisors is an integer number (1182219840).

Almost surely, 2^25264342565 is an apocalyptic number.

It is an amenable number.

25264342565 is a deficient number, since it is larger than the sum of its proper divisors (12566692315).

25264342565 is a wasteful number, since it uses less digits than its factorization.

25264342565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57233.

The product of its digits is 1728000, while the sum is 44.

The spelling of 25264342565 in words is "twenty-five billion, two hundred sixty-four million, three hundred forty-two thousand, five hundred sixty-five".