6349679557 has 8 divisors (see below), whose sum is σ = 7022930936. Its totient is φ = 5702830272.

The previous prime is 6349679549. The next prime is 6349679561. The reversal of 6349679557 is 7559769436.

It can be written as a sum of positive squares in 4 ways, for example, as 18931201 + 6330748356 = 4351^2 + 79566^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6349679557 - 2³ = 6349679549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6349679495 and 6349679504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6349679657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6600018 + ... + 6600979.

It is an arithmetic number, because the mean of its divisors is an integer number (877866367).

Almost surely, 2^6349679557 is an apocalyptic number.

It is an amenable number.

6349679557 is a deficient number, since it is larger than the sum of its proper divisors (673251379).

6349679557 is a wasteful number, since it uses less digits than its factorization.

6349679557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13201047.

The product of its digits is 42865200, while the sum is 61.

The square root of 6349679557 is about 79684.8765889739. The cubic root of 6349679557 is about 1851.7567492910.

The spelling of 6349679557 in words is "six billion, three hundred forty-nine million, six hundred seventy-nine thousand, five hundred fifty-seven".