1815473986560 has 704 divisors, whose sum is σ = 6962655974400. Its totient is φ = 445954719744.

The previous prime is 1815473986541. The next prime is 1815473986577. The reversal of 1815473986560 is 656893745181.

1815473986560 is a `hidden beast` number, since 1 + 8 + 1 + 547 + 3 + 9 + 86 + 5 + 6 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1328070997 + ... + 1328072363.

Almost surely, 2^{1815473986560} is an apocalyptic number.

1815473986560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1815473986560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3481327987200).

1815473986560 is an abundant number, since it is smaller than the sum of its proper divisors (5147181987840).

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

1815473986560 is a wasteful number, since it uses less digits than its factorization.

1815473986560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 1815473986560 in words is "one trillion, eight hundred fifteen billion, four hundred seventy-three million, nine hundred eighty-six thousand, five hundred sixty".