25211512505 has 16 divisors (see below), whose sum is σ = 30689535744. Its totient is φ = 19879113600.

The previous prime is 25211512457. The next prime is 25211512517. The reversal of 25211512505 is 50521511252.

It is not a de Polignac number, because 25211512505 - 2¹⁶ = 25211446969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519530 + ... + 565980.

It is an arithmetic number, because the mean of its divisors is an integer number (1918095984).

Almost surely, 2^25211512505 is an apocalyptic number.

It is an amenable number.

25211512505 is a deficient number, since it is larger than the sum of its proper divisors (5478023239).

25211512505 is a wasteful number, since it uses less digits than its factorization.

25211512505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48016.

The product of its (nonzero) digits is 5000, while the sum is 29.

The spelling of 25211512505 in words is "twenty-five billion, two hundred eleven million, five hundred twelve thousand, five hundred five".