25474523978 has 8 divisors (see below), whose sum is σ = 39444424320. Its totient is φ = 12326382540.

The previous prime is 25474523933. The next prime is 25474524001. The reversal of 25474523978 is 87932547452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205439648 + ... + 205439771.

It is an arithmetic number, because the mean of its divisors is an integer number (4930553040).

Almost surely, 2^25474523978 is an apocalyptic number.

25474523978 is a deficient number, since it is larger than the sum of its proper divisors (13969900342).

25474523978 is a wasteful number, since it uses less digits than its factorization.

25474523978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410879452.

The product of its digits is 16934400, while the sum is 56.

The spelling of 25474523978 in words is "twenty-five billion, four hundred seventy-four million, five hundred twenty-three thousand, nine hundred seventy-eight".