6315969861 has 6 divisors (see below), whose sum is σ = 9123067590. Its totient is φ = 4210646568.

The previous prime is 6315969857. The next prime is 6315969887. The reversal of 6315969861 is 1689695136.

It can be written as a sum of positive squares in only one way, i.e., 6199200225 + 116769636 = 78735^2 + 10806^2 .

It is not a de Polignac number, because 6315969861 - 2² = 6315969857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6315969798 and 6315969807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6315969851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 350887206 + ... + 350887223.

It is an arithmetic number, because the mean of its divisors is an integer number (1520511265).

Almost surely, 2^6315969861 is an apocalyptic number.

It is an amenable number.

6315969861 is a deficient number, since it is larger than the sum of its proper divisors (2807097729).

6315969861 is a wasteful number, since it uses less digits than its factorization.

6315969861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701774435 (or 701774432 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 6315969861 is about 79473.0763277728. The cubic root of 6315969861 is about 1848.4740141848.

The spelling of 6315969861 in words is "six billion, three hundred fifteen million, nine hundred sixty-nine thousand, eight hundred sixty-one".