25254711209 has 24 divisors (see below), whose sum is σ = 31339203840. Its totient is φ = 19926960768.

The previous prime is 25254711173. The next prime is 25254711211. The reversal of 25254711209 is 90211745252.

It is a de Polignac number, because none of the positive numbers 2^k-25254711209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25254711409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405077 + ... + 463245.

It is an arithmetic number, because the mean of its divisors is an integer number (1305800160).

Almost surely, 2^25254711209 is an apocalyptic number.

It is an amenable number.

25254711209 is a deficient number, since it is larger than the sum of its proper divisors (6084492631).

25254711209 is a wasteful number, since it uses less digits than its factorization.

25254711209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58569 (or 58556 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 25254711209 in words is "twenty-five billion, two hundred fifty-four million, seven hundred eleven thousand, two hundred nine".