25449263665 has 32 divisors (see below), whose sum is σ = 35709050880. Its totient is φ = 17048670144.

The previous prime is 25449263639. The next prime is 25449263677. The reversal of 25449263665 is 56636294452.

It is a cyclic number.

It is not a de Polignac number, because 25449263665 - 2⁵ = 25449263633 is a prime.

It is an unprimeable number.

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, 912396 + ... + 939874.

It is an arithmetic number, because the mean of its divisors is an integer number (1115907840).

Almost surely, 2^25449263665 is an apocalyptic number.

It is an amenable number.

25449263665 is a deficient number, since it is larger than the sum of its proper divisors (10259787215).

25449263665 is a wasteful number, since it uses less digits than its factorization.

25449263665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28101.

The product of its digits is 9331200, while the sum is 52.

The spelling of 25449263665 in words is "twenty-five billion, four hundred forty-nine million, two hundred sixty-three thousand, six hundred sixty-five".