6395993765 has 12 divisors (see below), whose sum is σ = 8928285516. Its totient is φ = 4385824128.

The previous prime is 6395993741. The next prime is 6395993831. The reversal of 6395993765 is 5673995936.

It can be written as a sum of positive squares in 2 ways, for example, as 3154057921 + 3241935844 = 56161^2 + 56938^2 .

It is not a de Polignac number, because 6395993765 - 2¹⁰ = 6395992741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6395993698 and 6395993707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13052804 + ... + 13053293.

It is an arithmetic number, because the mean of its divisors is an integer number (744023793).

Almost surely, 2^6395993765 is an apocalyptic number.

It is an amenable number.

6395993765 is a deficient number, since it is larger than the sum of its proper divisors (2532291751).

6395993765 is a wasteful number, since it uses less digits than its factorization.

6395993765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26106116 (or 26106109 counting only the distinct ones).

The product of its digits is 41334300, while the sum is 62.

The square root of 6395993765 is about 79974.9571115859. The cubic root of 6395993765 is about 1856.2480505899.

The spelling of 6395993765 in words is "six billion, three hundred ninety-five million, nine hundred ninety-three thousand, seven hundred sixty-five".