1641422844 has 144 divisors (see below), whose sum is σ = 4542720000. Its totient is φ = 497819520.

The previous prime is 1641422791. The next prime is 1641422851. The reversal of 1641422844 is 4482241461.

1641422844 is a `hidden beast` number, since 1 + 641 + 4 + 2 + 2 + 8 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1641422799 and 1641422808.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 4219402 + ... + 4219790.

Almost surely, 2^1641422844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641422844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2271360000).

1641422844 is an abundant number, since it is smaller than the sum of its proper divisors (2901297156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641422844 is a wasteful number, since it uses less digits than its factorization.

1641422844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 643 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 1641422844 is about 40514.4769681160. The cubic root of 1641422844 is about 1179.6146505764.

The spelling of 1641422844 in words is "one billion, six hundred forty-one million, four hundred twenty-two thousand, eight hundred forty-four".