1815294086912 has 72 divisors (see below), whose sum is σ = 3827980102800. Its totient is φ = 856771264512.

The previous prime is 1815294086911. The next prime is 1815294086923. The reversal of 1815294086912 is 2196804925181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1815294086911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673664 + ... + 2020992.

Almost surely, 2^{1815294086912} is an apocalyptic number.

It is a pronic number, being equal to 1347328×1347329.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1815294086912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1913990051400).

1815294086912 is an abundant number, since it is smaller than the sum of its proper divisors (2012686015888).

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

1815294086912 is a wasteful number, since it uses less digits than its factorization.

1815294086912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347641 (or 1347627 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 56.

The spelling of 1815294086912 in words is "one trillion, eight hundred fifteen billion, two hundred ninety-four million, eighty-six thousand, nine hundred twelve".