6171391013 has 4 divisors (see below), whose sum is σ = 6172169580. Its totient is φ = 6170612448.

The previous prime is 6171390991. The next prime is 6171391033. The reversal of 6171391013 is 3101931716.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2354869729 + 3816521284 = 48527^2 + 61778^2 .

It is a cyclic number.

It is not a de Polignac number, because 6171391013 - 2¹⁰ = 6171389989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6171391033) 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, 377270 + ... + 393287.

It is an arithmetic number, because the mean of its divisors is an integer number (1543042395).

Almost surely, 2^6171391013 is an apocalyptic number.

It is an amenable number.

6171391013 is a deficient number, since it is larger than the sum of its proper divisors (778567).

6171391013 is an equidigital number, since it uses as much as digits as its factorization.

6171391013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778566.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 6171391013 is about 78558.2014368965. The cubic root of 6171391013 is about 1834.2605313667.

The spelling of 6171391013 in words is "six billion, one hundred seventy-one million, three hundred ninety-one thousand, thirteen".