16631554716 has 504 divisors, whose sum is σ = 55389077856. Its totient is φ = 4337141760.

The previous prime is 16631554609. The next prime is 16631554717. The reversal of 16631554716 is 61745513661.

16631554716 is a `hidden beast` number, since 1 + 6 + 631 + 5 + 5 + 4 + 7 + 1 + 6 = 666.

It is a super-2 number, since 2×16631554716² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16631554717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 99590065 + ... + 99590231.

It is an arithmetic number, because the mean of its divisors is an integer number (109898964).

Almost surely, 2^16631554716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16631554716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27694538928).

16631554716 is an abundant number, since it is smaller than the sum of its proper divisors (38757523140).

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

16631554716 is a wasteful number, since it uses less digits than its factorization.

16631554716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 237 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 16631554716 in words is "sixteen billion, six hundred thirty-one million, five hundred fifty-four thousand, seven hundred sixteen".