278259228201 has 24 divisors (see below), whose sum is σ = 378374171616. Its totient is φ = 181895559040.

The previous prime is 278259228193. The next prime is 278259228223. The reversal of 278259228201 is 102822952872.

It is not a de Polignac number, because 278259228201 - 2³ = 278259228193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278259228281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15252181 + ... + 15270413.

It is an arithmetic number, because the mean of its divisors is an integer number (15765590484).

Almost surely, 2^278259228201 is an apocalyptic number.

It is an amenable number.

278259228201 is a deficient number, since it is larger than the sum of its proper divisors (100114943415).

278259228201 is a wasteful number, since it uses less digits than its factorization.

278259228201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20153 (or 20100 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 278259228201 in words is "two hundred seventy-eight billion, two hundred fifty-nine million, two hundred twenty-eight thousand, two hundred one".