3661323819 has 4 divisors (see below), whose sum is σ = 4881765096. Its totient is φ = 2440882544.

The previous prime is 3661323797. The next prime is 3661323857. The reversal of 3661323819 is 9183231663.

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

It is a cyclic number.

It is not a de Polignac number, because 3661323819 - 2¹² = 3661319723 is a prime.

It is a super-2 number, since 2×3661323819² = 26810584215153489522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3661323859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610220634 + ... + 610220639.

It is an arithmetic number, because the mean of its divisors is an integer number (1220441274).

Almost surely, 2^3661323819 is an apocalyptic number.

3661323819 is a deficient number, since it is larger than the sum of its proper divisors (1220441277).

3661323819 is a wasteful number, since it uses less digits than its factorization.

3661323819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220441276.

The product of its digits is 139968, while the sum is 42.

The square root of 3661323819 is about 60508.8738863979. The cubic root of 3661323819 is about 1541.2723250174.

The spelling of 3661323819 in words is "three billion, six hundred sixty-one million, three hundred twenty-three thousand, eight hundred nineteen".