16639064064 has 720 divisors, whose sum is σ = 61005344400. Its totient is φ = 4496228352.

The previous prime is 16639064063. The next prime is 16639064077. The reversal of 16639064064 is 46046093661.

16639064064 is a `hidden beast` number, since 1 + 6 + 639 + 0 + 6 + 4 + 0 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639064063) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 186955732 + ... + 186955820.

It is an arithmetic number, because the mean of its divisors is an integer number (84729645).

Almost surely, 2^16639064064 is an apocalyptic number.

16639064064 is a gapful number since it is divisible by the number (14) 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 16639064064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30502672200).

16639064064 is an abundant number, since it is smaller than the sum of its proper divisors (44366280336).

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

16639064064 is an equidigital number, since it uses as much as digits as its factorization.

16639064064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 16639064064 in words is "sixteen billion, six hundred thirty-nine million, sixty-four thousand, sixty-four".