8185990361 has 4 divisors (see below), whose sum is σ = 8261091300. Its totient is φ = 8110889424.

The previous prime is 8185990357. The next prime is 8185990391. The reversal of 8185990361 is 1630995818.

It is a happy number.

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 3747765961 + 4438224400 = 61219^2 + 66620^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185990361 - 2² = 8185990357 is a prime.

It is a super-3 number, since 3×8185990361³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8185990391) 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, 37550306 + ... + 37550523.

It is an arithmetic number, because the mean of its divisors is an integer number (2065272825).

Almost surely, 2^8185990361 is an apocalyptic number.

It is an amenable number.

8185990361 is a deficient number, since it is larger than the sum of its proper divisors (75100939).

8185990361 is a wasteful number, since it uses less digits than its factorization.

8185990361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75100938.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 8185990361 is about 90476.4630221584. The cubic root of 8185990361 is about 2015.3806119311.

The spelling of 8185990361 in words is "eight billion, one hundred eighty-five million, nine hundred ninety thousand, three hundred sixty-one".