25254212505 has 16 divisors (see below), whose sum is σ = 40535842560. Its totient is φ = 13425879168.

The previous prime is 25254212447. The next prime is 25254212519. The reversal of 25254212505 is 50521245252.

It is a happy number.

It is not a de Polignac number, because 25254212505 - 2²⁷ = 25119994777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2684785 + ... + 2694174.

It is an arithmetic number, because the mean of its divisors is an integer number (2533490160).

Almost surely, 2^25254212505 is an apocalyptic number.

It is an amenable number.

25254212505 is a deficient number, since it is larger than the sum of its proper divisors (15281630055).

25254212505 is a wasteful number, since it uses less digits than its factorization.

25254212505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379280.

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 25254212505 its reverse (50521245252), we get a palindrome (75775457757).

The spelling of 25254212505 in words is "twenty-five billion, two hundred fifty-four million, two hundred twelve thousand, five hundred five".