52161716999 has 4 divisors (see below), whose sum is σ = 59613390864. Its totient is φ = 44710043136.

The previous prime is 52161716941. The next prime is 52161717017. The reversal of 52161716999 is 99961716125.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52161716999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52161716909) 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, 3725836922 + ... + 3725836935.

It is an arithmetic number, because the mean of its divisors is an integer number (14903347716).

Almost surely, 2^52161716999 is an apocalyptic number.

52161716999 is a deficient number, since it is larger than the sum of its proper divisors (7451673865).

52161716999 is an equidigital number, since it uses as much as digits as its factorization.

52161716999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7451673864.

The product of its digits is 1837080, while the sum is 56.

The spelling of 52161716999 in words is "fifty-two billion, one hundred sixty-one million, seven hundred sixteen thousand, nine hundred ninety-nine".