16364505990 has 384 divisors, whose sum is σ = 49768243200. Its totient is φ = 3437683200.

The previous prime is 16364505973. The next prime is 16364506061. The reversal of 16364505990 is 9950546361.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 268270560 + ... + 268270620.

It is an arithmetic number, because the mean of its divisors is an integer number (129604800).

Almost surely, 2^16364505990 is an apocalyptic number.

16364505990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16364505990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24884121600).

16364505990 is an abundant number, since it is smaller than the sum of its proper divisors (33403737210).

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

16364505990 is a wasteful number, since it uses less digits than its factorization.

16364505990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 16364505990 in words is "sixteen billion, three hundred sixty-four million, five hundred five thousand, nine hundred ninety".