1841981456 has 20 divisors (see below), whose sum is σ = 4078673472. Its totient is φ = 789420576.

The previous prime is 1841981447. The next prime is 1841981489. The reversal of 1841981456 is 6541891481.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1841981456.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8223020 + ... + 8223243.

Almost surely, 2^1841981456 is an apocalyptic number.

1841981456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1841981456 is an abundant number, since it is smaller than the sum of its proper divisors (2236692016).

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

1841981456 is a wasteful number, since it uses less digits than its factorization.

1841981456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16446278 (or 16446272 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 1841981456 is about 42918.3114299712. The cubic root of 1841981456 is about 1225.8248407846.

The spelling of 1841981456 in words is "one billion, eight hundred forty-one million, nine hundred eighty-one thousand, four hundred fifty-six".