1883161661 has 4 divisors (see below), whose sum is σ = 1948098300. Its totient is φ = 1818225024.

The previous prime is 1883161601. The next prime is 1883161691. The reversal of 1883161661 is 1661613881.

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 858841636 + 1024320025 = 29306^2 + 32005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1883161661 - 2⁶ = 1883161597 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 (1883161601) 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, 32468276 + ... + 32468333.

It is an arithmetic number, because the mean of its divisors is an integer number (487024575).

Almost surely, 2^1883161661 is an apocalyptic number.

It is an amenable number.

1883161661 is a deficient number, since it is larger than the sum of its proper divisors (64936639).

1883161661 is an equidigital number, since it uses as much as digits as its factorization.

1883161661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64936638.

The product of its digits is 41472, while the sum is 41.

The square root of 1883161661 is about 43395.4105983571. The cubic root of 1883161661 is about 1234.8926373256.

The spelling of 1883161661 in words is "one billion, eight hundred eighty-three million, one hundred sixty-one thousand, six hundred sixty-one".