25525280078 has 16 divisors (see below), whose sum is σ = 39982065696. Its totient is φ = 12198743040.

The previous prime is 25525280063. The next prime is 25525280089. The reversal of 25525280078 is 87008252552.

It is a congruent number.

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, 141251 + ... + 266462.

It is an arithmetic number, because the mean of its divisors is an integer number (2498879106).

Almost surely, 2^25525280078 is an apocalyptic number.

25525280078 is a deficient number, since it is larger than the sum of its proper divisors (14456785618).

25525280078 is a wasteful number, since it uses less digits than its factorization.

25525280078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409099.

The product of its (nonzero) digits is 448000, while the sum is 44.

The spelling of 25525280078 in words is "twenty-five billion, five hundred twenty-five million, two hundred eighty thousand, seventy-eight".