16318955520 has 1024 divisors, whose sum is σ = 72476467200. Its totient is φ = 3397386240.

The previous prime is 16318955501. The next prime is 16318955617. The reversal of 16318955520 is 2555981361.

16318955520 is a `hidden beast` number, since 1 + 6 + 3 + 1 + 8 + 95 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1024).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 526417905 + ... + 526417935.

It is an arithmetic number, because the mean of its divisors is an integer number (70777800).

Almost surely, 2^16318955520 is an apocalyptic number.

16318955520 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 16318955520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36238233600).

16318955520 is an abundant number, since it is smaller than the sum of its proper divisors (56157511680).

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

16318955520 is an equidigital number, since it uses as much as digits as its factorization.

16318955520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 16318955520 in words is "sixteen billion, three hundred eighteen million, nine hundred fifty-five thousand, five hundred twenty".