6323117561 has 4 divisors (see below), whose sum is σ = 6325437300. Its totient is φ = 6320797824.

The previous prime is 6323117509. The next prime is 6323117587. The reversal of 6323117561 is 1657113236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5947494400 + 375623161 = 77120^2 + 19381^2 .

It is a cyclic number.

It is not a de Polignac number, because 6323117561 - 2¹⁰ = 6323116537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6323117761) 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, 1155776 + ... + 1161233.

It is an arithmetic number, because the mean of its divisors is an integer number (1581359325).

Almost surely, 2^6323117561 is an apocalyptic number.

It is an amenable number.

6323117561 is a deficient number, since it is larger than the sum of its proper divisors (2319739).

6323117561 is a wasteful number, since it uses less digits than its factorization.

6323117561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319738.

The product of its digits is 22680, while the sum is 35.

The square root of 6323117561 is about 79518.0329296443. The cubic root of 6323117561 is about 1849.1710492169.

The spelling of 6323117561 in words is "six billion, three hundred twenty-three million, one hundred seventeen thousand, five hundred sixty-one".