25278201228 has 96 divisors (see below), whose sum is σ = 67757874688. Its totient is φ = 7185024000.

The previous prime is 25278201209. The next prime is 25278201233. The reversal of 25278201228 is 82210287252.

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 31 ways as a sum of consecutive naturals, for example, 21047028 + ... + 21048228.

Almost surely, 2^25278201228 is an apocalyptic number.

25278201228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25278201228 is an abundant number, since it is smaller than the sum of its proper divisors (42479673460).

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

25278201228 is a wasteful number, since it uses less digits than its factorization.

25278201228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303 (or 2301 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 25278201228 in words is "twenty-five billion, two hundred seventy-eight million, two hundred one thousand, two hundred twenty-eight".