25253779278 has 64 divisors (see below), whose sum is σ = 62182213632. Its totient is φ = 6658295040.

The previous prime is 25253779267. The next prime is 25253779279. The reversal of 25253779278 is 87297735252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25253779279) 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 31 ways as a sum of consecutive naturals, for example, 2769675 + ... + 2778777.

It is an arithmetic number, because the mean of its divisors is an integer number (971597088).

Almost surely, 2^25253779278 is an apocalyptic number.

25253779278 is an abundant number, since it is smaller than the sum of its proper divisors (36928434354).

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

25253779278 is a wasteful number, since it uses less digits than its factorization.

25253779278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14209.

The product of its digits is 14817600, while the sum is 57.

The spelling of 25253779278 in words is "twenty-five billion, two hundred fifty-three million, seven hundred seventy-nine thousand, two hundred seventy-eight".