16671391488 has 180 divisors, whose sum is σ = 50345273440. Its totient is φ = 5486247936.

The previous prime is 16671391481. The next prime is 16671391523. The reversal of 16671391488 is 88419317661.

16671391488 is a `hidden beast` number, since 1 + 6 + 6 + 71 + 3 + 91 + 488 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671391481) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1633056 + ... + 1643232.

Almost surely, 2^16671391488 is an apocalyptic number.

16671391488 is a gapful number since it is divisible by the number (18) 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 16671391488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25172636720).

16671391488 is an abundant number, since it is smaller than the sum of its proper divisors (33673881952).

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

16671391488 is an equidigital number, since it uses as much as digits as its factorization.

16671391488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10284 (or 10261 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 16671391488 in words is "sixteen billion, six hundred seventy-one million, three hundred ninety-one thousand, four hundred eighty-eight".