16325001640 has 64 divisors (see below), whose sum is σ = 38630338560. Its totient is φ = 6196861440.

The previous prime is 16325001631. The next prime is 16325001653. The reversal of 16325001640 is 4610052361.

It is a junction number, because it is equal to n+sod(n) for n = 16325001599 and 16325001608.

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, 46980 + ... + 186700.

It is an arithmetic number, because the mean of its divisors is an integer number (603599040).

Almost surely, 2^16325001640 is an apocalyptic number.

16325001640 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 16325001640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19315169280).

16325001640 is an abundant number, since it is smaller than the sum of its proper divisors (22305336920).

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

16325001640 is a wasteful number, since it uses less digits than its factorization.

16325001640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139882 (or 139878 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 16325001640 in words is "sixteen billion, three hundred twenty-five million, one thousand, six hundred forty".