16518561792 has 240 divisors, whose sum is σ = 46857334272. Its totient is φ = 5166858240.

The previous prime is 16518561743. The next prime is 16518561809. The reversal of 16518561792 is 29716581561.

It is a super-2 number, since 2×16518561792² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56377198 + ... + 56377490.

Almost surely, 2^16518561792 is an apocalyptic number.

16518561792 is a gapful number since it is divisible by the number (12) 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 16518561792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23428667136).

16518561792 is an abundant number, since it is smaller than the sum of its proper divisors (30338772480).

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

16518561792 is an equidigital number, since it uses as much as digits as its factorization.

16518561792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 366 counting only the distinct ones).

The product of its digits is 907200, while the sum is 51.

The spelling of 16518561792 in words is "sixteen billion, five hundred eighteen million, five hundred sixty-one thousand, seven hundred ninety-two".