16906921285 has 8 divisors (see below), whose sum is σ = 20289178656. Its totient is φ = 13524954960.

The previous prime is 16906921247. The next prime is 16906921319. The reversal of 16906921285 is 58212960961.

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

It is not a de Polignac number, because 16906921285 - 2⁹ = 16906920773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86890 + ... + 203380.

It is an arithmetic number, because the mean of its divisors is an integer number (2536147332).

Almost surely, 2^16906921285 is an apocalyptic number.

It is an amenable number.

16906921285 is a deficient number, since it is larger than the sum of its proper divisors (3382257371).

16906921285 is a wasteful number, since it uses less digits than its factorization.

16906921285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145523.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 16906921285 in words is "sixteen billion, nine hundred six million, nine hundred twenty-one thousand, two hundred eighty-five".