108187278268891 has 4 divisors (see below), whose sum is σ = 108191392975072. Its totient is φ = 108183163562712.

The previous prime is 108187278268877. The next prime is 108187278268907. The reversal of 108187278268891 is 198862872781801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 108187278268891 - 2³⁵ = 108152918530523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108187278268591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2057313651 + ... + 2057366236.

It is an arithmetic number, because the mean of its divisors is an integer number (27047848243768).

Almost surely, 2^{108187278268891} is an apocalyptic number.

108187278268891 is a deficient number, since it is larger than the sum of its proper divisors (4114706181).

108187278268891 is an equidigital number, since it uses as much as digits as its factorization.

108187278268891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114706180.

The product of its (nonzero) digits is 346816512, while the sum is 76.

The spelling of 108187278268891 in words is "one hundred eight trillion, one hundred eighty-seven billion, two hundred seventy-eight million, two hundred sixty-eight thousand, eight hundred ninety-one".