16805705454 has 24 divisors (see below), whose sum is σ = 36437513112. Its totient is φ = 5598032400.

The previous prime is 16805705443. The next prime is 16805705459. The reversal of 16805705454 is 45450750861.

It is a super-2 number, since 2×16805705454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16805705459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295609 + ... + 347844.

It is an arithmetic number, because the mean of its divisors is an integer number (1518229713).

Almost surely, 2^16805705454 is an apocalyptic number.

16805705454 is an abundant number, since it is smaller than the sum of its proper divisors (19631807658).

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

16805705454 is a wasteful number, since it uses less digits than its factorization.

16805705454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644912 (or 644909 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 16805705454 in words is "sixteen billion, eight hundred five million, seven hundred five thousand, four hundred fifty-four".