6171657149 has 4 divisors (see below), whose sum is σ = 7053322464. Its totient is φ = 5289991836.

The previous prime is 6171657113. The next prime is 6171657209. The reversal of 6171657149 is 9417561716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6171657149 - 2¹² = 6171653053 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 (6171657949) 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, 440832647 + ... + 440832660.

It is an arithmetic number, because the mean of its divisors is an integer number (1763330616).

Almost surely, 2^6171657149 is an apocalyptic number.

It is an amenable number.

6171657149 is a deficient number, since it is larger than the sum of its proper divisors (881665315).

6171657149 is an equidigital number, since it uses as much as digits as its factorization.

6171657149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881665314.

The product of its digits is 317520, while the sum is 47.

The square root of 6171657149 is about 78559.8952965188. The cubic root of 6171657149 is about 1834.2868979640.

The spelling of 6171657149 in words is "six billion, one hundred seventy-one million, six hundred fifty-seven thousand, one hundred forty-nine".