16556961708 has 192 divisors, whose sum is σ = 52066022400. Its totient is φ = 4441789440.

The previous prime is 16556961667. The next prime is 16556961739. The reversal of 16556961708 is 80716965561.

16556961708 is a `hidden beast` number, since 1 + 6 + 5 + 569 + 6 + 1 + 70 + 8 = 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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6540403 + ... + 6542933.

It is an arithmetic number, because the mean of its divisors is an integer number (271177200).

Almost surely, 2^16556961708 is an apocalyptic number.

16556961708 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 16556961708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26033011200).

16556961708 is an abundant number, since it is smaller than the sum of its proper divisors (35509060692).

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

16556961708 is a wasteful number, since it uses less digits than its factorization.

16556961708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 16556961708 in words is "sixteen billion, five hundred fifty-six million, nine hundred sixty-one thousand, seven hundred eight".