25211512506 has 8 divisors (see below), whose sum is σ = 50423025024. Its totient is φ = 8403837500.

The previous prime is 25211512457. The next prime is 25211512517. The reversal of 25211512506 is 60521511252.

It is a sphenic number, since it is the product of 3 distinct primes.

25211512506 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2100959370 + ... + 2100959381.

It is an arithmetic number, because the mean of its divisors is an integer number (6302878128).

Almost surely, 2^25211512506 is an apocalyptic number.

25211512506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25211512506 is a wasteful number, since it uses less digits than its factorization.

25211512506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201918756.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 25211512506 in words is "twenty-five billion, two hundred eleven million, five hundred twelve thousand, five hundred six".