25229187965 has 32 divisors (see below), whose sum is σ = 31372551936. Its totient is φ = 19462118400.

The previous prime is 25229187887. The next prime is 25229187979. The reversal of 25229187965 is 56978192252.

It is not a de Polignac number, because 25229187965 - 2¹² = 25229183869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25229187965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16564694 + ... + 16566216.

It is an arithmetic number, because the mean of its divisors is an integer number (980392248).

Almost surely, 2^25229187965 is an apocalyptic number.

It is an amenable number.

25229187965 is a deficient number, since it is larger than the sum of its proper divisors (6143363971).

25229187965 is a wasteful number, since it uses less digits than its factorization.

25229187965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309.

The product of its digits is 5443200, while the sum is 56.

The spelling of 25229187965 in words is "twenty-five billion, two hundred twenty-nine million, one hundred eighty-seven thousand, nine hundred sixty-five".