16721008735 has 8 divisors (see below), whose sum is σ = 20607513696. Its totient is φ = 13015271520.

The previous prime is 16721008709. The next prime is 16721008741. The reversal of 16721008735 is 53780012761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16721008735 - 2⁷ = 16721008607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 45191731 + ... + 45192100.

It is an arithmetic number, because the mean of its divisors is an integer number (2575939212).

Almost surely, 2^16721008735 is an apocalyptic number.

16721008735 is a deficient number, since it is larger than the sum of its proper divisors (3886504961).

16721008735 is an equidigital number, since it uses as much as digits as its factorization.

16721008735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90383873.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 16721008735 in words is "sixteen billion, seven hundred twenty-one million, eight thousand, seven hundred thirty-five".