16663191552 has 336 divisors, whose sum is σ = 55817536320. Its totient is φ = 4691460096.

The previous prime is 16663191521. The next prime is 16663191557. The reversal of 16663191552 is 25519136661.

It is a tau number, because it is divible by the number of its divisors (336).

It is a junction number, because it is equal to n+sod(n) for n = 16663191498 and 16663191507.

It is not an unprimeable number, because it can be changed into a prime (16663191557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42835774 + ... + 42836162.

It is an arithmetic number, because the mean of its divisors is an integer number (166123620).

Almost surely, 2^16663191552 is an apocalyptic number.

16663191552 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 16663191552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27908768160).

16663191552 is an abundant number, since it is smaller than the sum of its proper divisors (39154344768).

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

16663191552 is an equidigital number, since it uses as much as digits as its factorization.

16663191552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 484 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The spelling of 16663191552 in words is "sixteen billion, six hundred sixty-three million, one hundred ninety-one thousand, five hundred fifty-two".