16519990320 has 240 divisors, whose sum is σ = 56463511104. Its totient is φ = 4327680000.

The previous prime is 16519990309. The next prime is 16519990337. The reversal of 16519990320 is 2309991561.

It is a happy number.

16519990320 is a `hidden beast` number, since 16 + 519 + 9 + 90 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23565970 + ... + 23566670.

Almost surely, 2^16519990320 is an apocalyptic number.

16519990320 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 16519990320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28231755552).

16519990320 is an abundant number, since it is smaller than the sum of its proper divisors (39943520784).

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

16519990320 is a wasteful number, since it uses less digits than its factorization.

16519990320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1243 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The spelling of 16519990320 in words is "sixteen billion, five hundred nineteen million, nine hundred ninety thousand, three hundred twenty".