16518403680 has 48 divisors (see below), whose sum is σ = 52032973104. Its totient is φ = 4404907520.

The previous prime is 16518403679. The next prime is 16518403687. The reversal of 16518403680 is 8630481561.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16518403687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17206191 + ... + 17207150.

It is an arithmetic number, because the mean of its divisors is an integer number (1084020273).

Almost surely, 2^16518403680 is an apocalyptic number.

16518403680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16518403680 is an abundant number, since it is smaller than the sum of its proper divisors (35514569424).

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

16518403680 is a wasteful number, since it uses less digits than its factorization.

16518403680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34413359 (or 34413351 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 16518403680 in words is "sixteen billion, five hundred eighteen million, four hundred three thousand, six hundred eighty".