16487815680 has 800 divisors, whose sum is σ = 69540299136. Its totient is φ = 3654844416.

The previous prime is 16487815661. The next prime is 16487815703. The reversal of 16487815680 is 8651878461.

It is a happy number.

16487815680 is a `hidden beast` number, since 1 + 6 + 4 + 8 + 78 + 1 + 568 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 53706087 + ... + 53706393.

Almost surely, 2^16487815680 is an apocalyptic number.

16487815680 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 16487815680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34770149568).

16487815680 is an abundant number, since it is smaller than the sum of its proper divisors (53052483456).

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

16487815680 is an equidigital number, since it uses as much as digits as its factorization.

16487815680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 16487815680 in words is "sixteen billion, four hundred eighty-seven million, eight hundred fifteen thousand, six hundred eighty".