16840615680 has 216 divisors, whose sum is σ = 66590920032. Its totient is φ = 3849265152.

The previous prime is 16840615679. The next prime is 16840615681. The reversal of 16840615680 is 8651604861.

16840615680 is a `hidden beast` number, since 1 + 6 + 84 + 0 + 6 + 1 + 568 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (16840615679) and next prime (16840615681).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16840615681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23779 + ... + 185058.

Almost surely, 2^16840615680 is an apocalyptic number.

16840615680 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 16840615680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33295460016).

16840615680 is an abundant number, since it is smaller than the sum of its proper divisors (49750304352).

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

16840615680 is a wasteful number, since it uses less digits than its factorization.

16840615680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208871 (or 208854 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 16840615680 in words is "sixteen billion, eight hundred forty million, six hundred fifteen thousand, six hundred eighty".