255387518101887 has 8 divisors (see below), whose sum is σ = 340680164978304. Its totient is φ = 170176608313368.

The previous prime is 255387518101883. The next prime is 255387518101931. The reversal of 255387518101887 is 788101815783552.

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

It is not a de Polignac number, because 255387518101887 - 2² = 255387518101883 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255387518101883) 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, 20434264683 + ... + 20434277180.

It is an arithmetic number, because the mean of its divisors is an integer number (42585020622288).

Almost surely, 2^{255387518101887} is an apocalyptic number.

255387518101887 is a deficient number, since it is larger than the sum of its proper divisors (85292646876417).

255387518101887 is a wasteful number, since it uses less digits than its factorization.

255387518101887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40868543949.

The product of its (nonzero) digits is 150528000, while the sum is 69.

The spelling of 255387518101887 in words is "two hundred fifty-five trillion, three hundred eighty-seven billion, five hundred eighteen million, one hundred one thousand, eight hundred eighty-seven".