25425212566550 has 48 divisors (see below), whose sum is σ = 49781552682960. Its totient is φ = 9634495559040.

The previous prime is 25425212566409. The next prime is 25425212566571. The reversal of 25425212566550 is 5566521252452.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29030864 + ... + 29893836.

It is an arithmetic number, because the mean of its divisors is an integer number (1037115680895).

Almost surely, 2^{25425212566550} is an apocalyptic number.

25425212566550 is a deficient number, since it is larger than the sum of its proper divisors (24356340116410).

25425212566550 is a wasteful number, since it uses less digits than its factorization.

25425212566550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894017 (or 894012 counting only the distinct ones).

The product of its (nonzero) digits is 7200000, while the sum is 50.

The spelling of 25425212566550 in words is "twenty-five trillion, four hundred twenty-five billion, two hundred twelve million, five hundred sixty-six thousand, five hundred fifty".