27872171205 has 32 divisors (see below), whose sum is σ = 45055180800. Its totient is φ = 14712489792.

The previous prime is 27872171137. The next prime is 27872171231. The reversal of 27872171205 is 50217127872.

It is not a de Polignac number, because 27872171205 - 2²² = 27867976901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780736 + ... + 815654.

It is an arithmetic number, because the mean of its divisors is an integer number (1407974400).

Almost surely, 2^27872171205 is an apocalyptic number.

It is an amenable number.

27872171205 is a deficient number, since it is larger than the sum of its proper divisors (17183009595).

27872171205 is a wasteful number, since it uses less digits than its factorization.

27872171205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35473.

The product of its (nonzero) digits is 109760, while the sum is 42.

The spelling of 27872171205 in words is "twenty-seven billion, eight hundred seventy-two million, one hundred seventy-one thousand, two hundred five".