25550520505 has 16 divisors (see below), whose sum is σ = 30953894400. Its totient is φ = 20245049280.

The previous prime is 25550520491. The next prime is 25550520517. The reversal of 25550520505 is 50502505552.

It is not a de Polignac number, because 25550520505 - 2¹⁵ = 25550487737 is a prime.

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, 1692340 + ... + 1707370.

It is an arithmetic number, because the mean of its divisors is an integer number (1934618400).

Almost surely, 2^25550520505 is an apocalyptic number.

It is an amenable number.

25550520505 is a deficient number, since it is larger than the sum of its proper divisors (5403373895).

25550520505 is a wasteful number, since it uses less digits than its factorization.

25550520505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18264.

The product of its (nonzero) digits is 62500, while the sum is 34.

The spelling of 25550520505 in words is "twenty-five billion, five hundred fifty million, five hundred twenty thousand, five hundred five".