16801622544 has 480 divisors, whose sum is σ = 55888994304. Its totient is φ = 4321658880.

The previous prime is 16801622533. The next prime is 16801622569. The reversal of 16801622544 is 44522610861.

It is a happy number.

It is a super-2 number, since 2×16801622544² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 72109852 + ... + 72110084.

Almost surely, 2^16801622544 is an apocalyptic number.

16801622544 is a gapful number since it is divisible by the number (14) 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 16801622544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27944497152).

16801622544 is an abundant number, since it is smaller than the sum of its proper divisors (39087371760).

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

16801622544 is a wasteful number, since it uses less digits than its factorization.

16801622544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 16801622544 in words is "sixteen billion, eight hundred one million, six hundred twenty-two thousand, five hundred forty-four".