1812197728416 has 24 divisors (see below), whose sum is σ = 4757019037344. Its totient is φ = 604065909440.

The previous prime is 1812197728403. The next prime is 1812197728427. The reversal of 1812197728416 is 6148277912181.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1812197728416² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9438529740 + ... + 9438529931.

It is an arithmetic number, because the mean of its divisors is an integer number (198209126556).

Almost surely, 2^{1812197728416} is an apocalyptic number.

1812197728416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1812197728416 is an abundant number, since it is smaller than the sum of its proper divisors (2944821308928).

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

1812197728416 is a wasteful number, since it uses less digits than its factorization.

1812197728416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18877059684 (or 18877059676 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 57.

The spelling of 1812197728416 in words is "one trillion, eight hundred twelve billion, one hundred ninety-seven million, seven hundred twenty-eight thousand, four hundred sixteen".