25478893554 has 16 divisors (see below), whose sum is σ = 51020785440. Its totient is φ = 8482464800.

The previous prime is 25478893541. The next prime is 25478893571. The reversal of 25478893554 is 45539887452.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2619672 + ... + 2629379.

It is an arithmetic number, because the mean of its divisors is an integer number (3188799090).

Almost surely, 2^25478893554 is an apocalyptic number.

25478893554 is an abundant number, since it is smaller than the sum of its proper divisors (25541891886).

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

25478893554 is a wasteful number, since it uses less digits than its factorization.

25478893554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249865.

The product of its digits is 48384000, while the sum is 60.

The spelling of 25478893554 in words is "twenty-five billion, four hundred seventy-eight million, eight hundred ninety-three thousand, five hundred fifty-four".