16197296640 has 320 divisors, whose sum is σ = 61093232640. Its totient is φ = 3582443520.

The previous prime is 16197296639. The next prime is 16197296657. The reversal of 16197296640 is 4669279161.

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1661701 + ... + 1671419.

It is an arithmetic number, because the mean of its divisors is an integer number (190916352).

Almost surely, 2^16197296640 is an apocalyptic number.

16197296640 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 16197296640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30546616320).

16197296640 is an abundant number, since it is smaller than the sum of its proper divisors (44895936000).

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

16197296640 is an equidigital number, since it uses as much as digits as its factorization.

16197296640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9783 (or 9767 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 16197296640 in words is "sixteen billion, one hundred ninety-seven million, two hundred ninety-six thousand, six hundred forty".