1816740440800 has 72 divisors (see below), whose sum is σ = 4449109129416. Its totient is φ = 724403658240.

The previous prime is 1816740440777. The next prime is 1816740440831. The reversal of 1816740440800 is 80440476181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3328302 + ... + 3835501.

It is an arithmetic number, because the mean of its divisors is an integer number (61793182353).

Almost surely, 2^{1816740440800} is an apocalyptic number.

1816740440800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816740440800 is an abundant number, since it is smaller than the sum of its proper divisors (2632368688616).

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

1816740440800 is a wasteful number, since it uses less digits than its factorization.

1816740440800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164140 (or 7164127 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 1816740440800 in words is "one trillion, eight hundred sixteen billion, seven hundred forty million, four hundred forty thousand, eight hundred".