25868191228 has 24 divisors (see below), whose sum is σ = 49388868144. Its totient is φ = 11757283200.

The previous prime is 25868191201. The next prime is 25868191243. The reversal of 25868191228 is 82219186852.

It is a super-2 number, since 2×25868191228² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 876976 + ... + 905992.

It is an arithmetic number, because the mean of its divisors is an integer number (2057869506).

Almost surely, 2^25868191228 is an apocalyptic number.

It is an amenable number.

25868191228 is a deficient number, since it is larger than the sum of its proper divisors (23520676916).

25868191228 is a wasteful number, since it uses less digits than its factorization.

25868191228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49293 (or 49291 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 52.

The spelling of 25868191228 in words is "twenty-five billion, eight hundred sixty-eight million, one hundred ninety-one thousand, two hundred twenty-eight".