1838481221376 has 144 divisors (see below), whose sum is σ = 5525840108320. Its totient is φ = 602780590080.

The previous prime is 1838481221351. The next prime is 1838481221387. The reversal of 1838481221376 is 6731221848381.

1838481221376 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 48 + 1 + 221 + 376 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758565 + ... + 2601828.

Almost surely, 2^{1838481221376} is an apocalyptic number.

1838481221376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1838481221376 is an abundant number, since it is smaller than the sum of its proper divisors (3687358886944).

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

1838481221376 is an equidigital number, since it uses as much as digits as its factorization.

1838481221376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360479 (or 4360459 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 1838481221376 in words is "one trillion, eight hundred thirty-eight billion, four hundred eighty-one million, two hundred twenty-one thousand, three hundred seventy-six".