16641602680 has 64 divisors (see below), whose sum is σ = 37991197440. Its totient is φ = 6559460352.

The previous prime is 16641602669. The next prime is 16641602707. The reversal of 16641602680 is 8620614661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 4573822 + ... + 4577458.

It is an arithmetic number, because the mean of its divisors is an integer number (593612460).

Almost surely, 2^16641602680 is an apocalyptic number.

16641602680 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 16641602680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18995598720).

16641602680 is an abundant number, since it is smaller than the sum of its proper divisors (21349594760).

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

16641602680 is a wasteful number, since it uses less digits than its factorization.

16641602680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288 (or 5284 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 16641602680 in words is "sixteen billion, six hundred forty-one million, six hundred two thousand, six hundred eighty".