8161687199 has 8 divisors (see below), whose sum is σ = 8646921360. Its totient is φ = 7677023616.

The previous prime is 8161687169. The next prime is 8161687229. The reversal of 8161687199 is 9917861618.

It is an interprime number because it is at equal distance from previous prime (8161687169) and next prime (8161687229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8161687199 - 2³² = 3866719903 is a prime.

It is a super-2 number, since 2×8161687199² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161687159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113009 + ... + 170570.

It is an arithmetic number, because the mean of its divisors is an integer number (1080865170).

Almost surely, 2^8161687199 is an apocalyptic number.

8161687199 is a deficient number, since it is larger than the sum of its proper divisors (485234161).

8161687199 is a wasteful number, since it uses less digits than its factorization.

8161687199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285289.

The product of its digits is 1306368, while the sum is 56.

The square root of 8161687199 is about 90342.0566458391. The cubic root of 8161687199 is about 2013.3841655081.

The spelling of 8161687199 in words is "eight billion, one hundred sixty-one million, six hundred eighty-seven thousand, one hundred ninety-nine".