1821483661 has 8 divisors (see below), whose sum is σ = 1837136000. Its totient is φ = 1805868000.

The previous prime is 1821483623. The next prime is 1821483679. The reversal of 1821483661 is 1663841281.

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 1821483661 - 2²⁵ = 1787929229 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 (1821483691) 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, 95665 + ... + 113113.

It is an arithmetic number, because the mean of its divisors is an integer number (229642000).

Almost surely, 2^1821483661 is an apocalyptic number.

It is an amenable number.

1821483661 is a deficient number, since it is larger than the sum of its proper divisors (15652339).

1821483661 is a wasteful number, since it uses less digits than its factorization.

1821483661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18339.

The product of its digits is 55296, while the sum is 40.

The square root of 1821483661 is about 42678.8432481481. The cubic root of 1821483661 is about 1221.2608261126.

The spelling of 1821483661 in words is "one billion, eight hundred twenty-one million, four hundred eighty-three thousand, six hundred sixty-one".