25229774466 has 48 divisors (see below), whose sum is σ = 59748159744. Its totient is φ = 7647136992.

The previous prime is 25229774459. The next prime is 25229774513. The reversal of 25229774466 is 66447792252.

It is a happy number.

25229774466 is a `hidden beast` number, since 2 + 5 + 22 + 97 + 74 + 466 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 788946 + ... + 820301.

It is an arithmetic number, because the mean of its divisors is an integer number (1244753328).

Almost surely, 2^25229774466 is an apocalyptic number.

25229774466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25229774466 is an abundant number, since it is smaller than the sum of its proper divisors (34518385278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25229774466 is a wasteful number, since it uses less digits than its factorization.

25229774466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609335 (or 1609332 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 25229774466 in words is "twenty-five billion, two hundred twenty-nine million, seven hundred seventy-four thousand, four hundred sixty-six".