27720367472171 has 12 divisors (see below), whose sum is σ = 30478223302632. Its totient is φ = 25193115024000.

The previous prime is 27720367472143. The next prime is 27720367472177. The reversal of 27720367472171 is 17127476302772.

It is a happy number.

It is not a de Polignac number, because 27720367472171 - 2¹⁸ = 27720367210027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27720367472177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32389670 + ... + 33234491.

It is an arithmetic number, because the mean of its divisors is an integer number (2539851941886).

Almost surely, 2^{27720367472171} is an apocalyptic number.

27720367472171 is a deficient number, since it is larger than the sum of its proper divisors (2757855830461).

27720367472171 is a wasteful number, since it uses less digits than its factorization.

27720367472171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65627674 (or 65627663 counting only the distinct ones).

The product of its (nonzero) digits is 9680832, while the sum is 56.

The spelling of 27720367472171 in words is "twenty-seven trillion, seven hundred twenty billion, three hundred sixty-seven million, four hundred seventy-two thousand, one hundred seventy-one".