16815842560 has 144 divisors (see below), whose sum is σ = 45457251840. Its totient is φ = 5903851520.

The previous prime is 16815842557. The next prime is 16815842581. The reversal of 16815842560 is 6524851861.

It is a super-2 number, since 2×16815842560² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16815842560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387729 + ... + 428911.

It is an arithmetic number, because the mean of its divisors is an integer number (315675360).

Almost surely, 2^16815842560 is an apocalyptic number.

16815842560 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 16815842560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22728625920).

16815842560 is an abundant number, since it is smaller than the sum of its proper divisors (28641409280).

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

16815842560 is a wasteful number, since it uses less digits than its factorization.

16815842560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41244 (or 41230 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 16815842560 in words is "sixteen billion, eight hundred fifteen million, eight hundred forty-two thousand, five hundred sixty".