25278278055 has 8 divisors (see below), whose sum is σ = 40445244912. Its totient is φ = 13481748288.

The previous prime is 25278278029. The next prime is 25278278059. The reversal of 25278278055 is 55087287252.

It is a happy number.

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

It is not a de Polignac number, because 25278278055 - 2⁹ = 25278277543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25278277989 and 25278278007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25278278059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842609254 + ... + 842609283.

It is an arithmetic number, because the mean of its divisors is an integer number (5055655614).

Almost surely, 2^25278278055 is an apocalyptic number.

25278278055 is a deficient number, since it is larger than the sum of its proper divisors (15166966857).

25278278055 is a wasteful number, since it uses less digits than its factorization.

25278278055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685218545.

The product of its (nonzero) digits is 3136000, while the sum is 51.

The spelling of 25278278055 in words is "twenty-five billion, two hundred seventy-eight million, two hundred seventy-eight thousand, fifty-five".