25055278028 has 24 divisors (see below), whose sum is σ = 50646499344. Its totient is φ = 10718835200.

The previous prime is 25055278021. The next prime is 25055278033. The reversal of 25055278028 is 82087255052.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a self number, because there is not a number n which added to its sum of digits gives 25055278028.

It is not an unprimeable number, because it can be changed into a prime (25055278021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16747433 + ... + 16748928.

It is an arithmetic number, because the mean of its divisors is an integer number (2110270806).

Almost surely, 2^25055278028 is an apocalyptic number.

It is an amenable number.

25055278028 is an abundant number, since it is smaller than the sum of its proper divisors (25591221316).

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

25055278028 is a wasteful number, since it uses less digits than its factorization.

25055278028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33496393 (or 33496391 counting only the distinct ones).

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

The spelling of 25055278028 in words is "twenty-five billion, fifty-five million, two hundred seventy-eight thousand, twenty-eight".