1841781216 has 48 divisors (see below), whose sum is σ = 5274194688. Its totient is φ = 558115200.

The previous prime is 1841781209. The next prime is 1841781257. The reversal of 1841781216 is 6121871481.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1841781216² = 6784316095220877312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 871000 + ... + 873111.

It is an arithmetic number, because the mean of its divisors is an integer number (109879056).

Almost surely, 2^1841781216 is an apocalyptic number.

1841781216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1841781216 is an abundant number, since it is smaller than the sum of its proper divisors (3432413472).

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

1841781216 is a wasteful number, since it uses less digits than its factorization.

1841781216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744135 (or 1744127 counting only the distinct ones).

The product of its digits is 21504, while the sum is 39.

The square root of 1841781216 is about 42915.9785627684. The cubic root of 1841781216 is about 1225.7804197690.

The spelling of 1841781216 in words is "one billion, eight hundred forty-one million, seven hundred eighty-one thousand, two hundred sixteen".