16446459990 has 32 divisors (see below), whose sum is σ = 40832592480. Its totient is φ = 4234490624.

The previous prime is 16446459989. The next prime is 16446460013. The reversal of 16446459990 is 9995464461.

It is a self number, because there is not a number n which added to its sum of digits gives 16446459990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9451119 + ... + 9452858.

It is an arithmetic number, because the mean of its divisors is an integer number (1276018515).

Almost surely, 2^16446459990 is an apocalyptic number.

16446459990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16446459990 is an abundant number, since it is smaller than the sum of its proper divisors (24386132490).

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

16446459990 is a wasteful number, since it uses less digits than its factorization.

16446459990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18904016.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 16446459990 in words is "sixteen billion, four hundred forty-six million, four hundred fifty-nine thousand, nine hundred ninety".