25280032505 has 16 divisors (see below), whose sum is σ = 37336664064. Its totient is φ = 16001426880.

The previous prime is 25280032499. The next prime is 25280032517. The reversal of 25280032505 is 50523008252.

It is not a de Polignac number, because 25280032505 - 2⁶ = 25280032441 is a prime.

It is a Curzon 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, 27779801 + ... + 27780710.

It is an arithmetic number, because the mean of its divisors is an integer number (2333541504).

Almost surely, 2^25280032505 is an apocalyptic number.

It is an amenable number.

25280032505 is a deficient number, since it is larger than the sum of its proper divisors (12056631559).

25280032505 is a wasteful number, since it uses less digits than its factorization.

25280032505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55560536.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 25280032505 in words is "twenty-five billion, two hundred eighty million, thirty-two thousand, five hundred five".