6391755617 has 16 divisors (see below), whose sum is σ = 7042267008. Its totient is φ = 5765410560.

The previous prime is 6391755611. The next prime is 6391755641. The reversal of 6391755617 is 7165571936.

It is not a de Polignac number, because 6391755617 - 2³² = 2096788321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6391755611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73658 + ... + 134940.

It is an arithmetic number, because the mean of its divisors is an integer number (440141688).

Almost surely, 2^6391755617 is an apocalyptic number.

It is an amenable number.

6391755617 is a deficient number, since it is larger than the sum of its proper divisors (650511391).

6391755617 is a wasteful number, since it uses less digits than its factorization.

6391755617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61480.

The product of its digits is 1190700, while the sum is 50.

The square root of 6391755617 is about 79948.4560013513. The cubic root of 6391755617 is about 1855.8379609552.

The spelling of 6391755617 in words is "six billion, three hundred ninety-one million, seven hundred fifty-five thousand, six hundred seventeen".