16551964320 has 192 divisors, whose sum is σ = 55606642560. Its totient is φ = 4124049408.

The previous prime is 16551964307. The next prime is 16551964343. The reversal of 16551964320 is 2346915561.

It is a super-3 number, since 3×16551964320³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1126944 + ... + 1141536.

It is an arithmetic number, because the mean of its divisors is an integer number (289617930).

Almost surely, 2^16551964320 is an apocalyptic number.

16551964320 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 16551964320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27803321280).

16551964320 is an abundant number, since it is smaller than the sum of its proper divisors (39054678240).

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

16551964320 is a wasteful number, since it uses less digits than its factorization.

16551964320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14767 (or 14759 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 16551964320 in words is "sixteen billion, five hundred fifty-one million, nine hundred sixty-four thousand, three hundred twenty".