6171778339 has 4 divisors (see below), whose sum is σ = 6322309560. Its totient is φ = 6021247120.

The previous prime is 6171778331. The next prime is 6171778343. The reversal of 6171778339 is 9338771716.

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 6171778339 - 2³ = 6171778331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6171778331) 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, 75265549 + ... + 75265630.

It is an arithmetic number, because the mean of its divisors is an integer number (1580577390).

Almost surely, 2^6171778339 is an apocalyptic number.

6171778339 is a deficient number, since it is larger than the sum of its proper divisors (150531221).

6171778339 is a wasteful number, since it uses less digits than its factorization.

6171778339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150531220.

The product of its digits is 1333584, while the sum is 52.

The square root of 6171778339 is about 78560.6666150434. Note that the first 4 decimals coincide. The cubic root of 6171778339 is about 1834.2989042355.

The spelling of 6171778339 in words is "six billion, one hundred seventy-one million, seven hundred seventy-eight thousand, three hundred thirty-nine".