16929642816 has 196 divisors, whose sum is σ = 50846469300. Its totient is φ = 5589762048.

The previous prime is 16929642809. The next prime is 16929642817. The reversal of 16929642816 is 61824692961.

It can be written as a sum of positive squares in 2 ways, for example, as 9239054400 + 7690588416 = 96120^2 + 87696^2 .

It is a super-2 number, since 2×16929642816² (a number of 21 digits) contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16929642817) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5083840 + ... + 5087168.

Almost surely, 2^16929642816 is an apocalyptic number.

16929642816 is a gapful number since it is divisible by the number (16) 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 16929642816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25423234650).

16929642816 is an abundant number, since it is smaller than the sum of its proper divisors (33916826484).

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

16929642816 is an equidigital number, since it uses as much as digits as its factorization.

16929642816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 3443 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 16929642816 in words is "sixteen billion, nine hundred twenty-nine million, six hundred forty-two thousand, eight hundred sixteen".