1812318419520 has 168 divisors, whose sum is σ = 7124137485504. Its totient is φ = 414244205568.

The previous prime is 1812318419503. The next prime is 1812318419567. The reversal of 1812318419520 is 259148132181.

1812318419520 is a `hidden beast` number, since 1 + 8 + 1 + 2 + 31 + 84 + 19 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44928214 + ... + 44968533.

Almost surely, 2^{1812318419520} is an apocalyptic number.

1812318419520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1812318419520 is an abundant number, since it is smaller than the sum of its proper divisors (5311819065984).

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

1812318419520 is a wasteful number, since it uses less digits than its factorization.

1812318419520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89896777 (or 89896764 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 1812318419520 in words is "one trillion, eight hundred twelve billion, three hundred eighteen million, four hundred nineteen thousand, five hundred twenty".