1721835016 has 64 divisors (see below), whose sum is σ = 3764880000. Its totient is φ = 730329600.

The previous prime is 1721835007. The next prime is 1721835019. The reversal of 1721835016 is 6105381271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1721835019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72610 + ... + 93358.

It is an arithmetic number, because the mean of its divisors is an integer number (58826250).

Almost surely, 2^1721835016 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 1721835016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882440000).

1721835016 is an abundant number, since it is smaller than the sum of its proper divisors (2043044984).

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

1721835016 is a wasteful number, since it uses less digits than its factorization.

1721835016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20830 (or 20826 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1721835016 is about 41494.9998915532. Note that the first 3 decimals coincide. The cubic root of 1721835016 is about 1198.5712198683.

The spelling of 1721835016 in words is "one billion, seven hundred twenty-one million, eight hundred thirty-five thousand, sixteen".