25254845478 has 24 divisors (see below), whose sum is σ = 54750693816. Its totient is φ = 8413380000.

The previous prime is 25254845453. The next prime is 25254845519. The reversal of 25254845478 is 87454845252.

25254845478 is a `hidden beast` number, since 2 + 52 + 5 + 48 + 4 + 547 + 8 = 666.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 376648 + ... + 438603.

It is an arithmetic number, because the mean of its divisors is an integer number (2281278909).

Almost surely, 2^25254845478 is an apocalyptic number.

25254845478 is an abundant number, since it is smaller than the sum of its proper divisors (29495848338).

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

25254845478 is a wasteful number, since it uses less digits than its factorization.

25254845478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816980 (or 816977 counting only the distinct ones).

The product of its digits is 14336000, while the sum is 54.

The spelling of 25254845478 in words is "twenty-five billion, two hundred fifty-four million, eight hundred forty-five thousand, four hundred seventy-eight".