16891958213 has 8 divisors (see below), whose sum is σ = 18203931648. Its totient is φ = 15581783664.

The previous prime is 16891958201. The next prime is 16891958219. The reversal of 16891958213 is 31285919861.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16891958213 - 2¹² = 16891954117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16891958219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430181 + ... + 467802.

It is an arithmetic number, because the mean of its divisors is an integer number (2275491456).

Almost surely, 2^16891958213 is an apocalyptic number.

16891958213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16891958213 is a deficient number, since it is larger than the sum of its proper divisors (1311973435).

16891958213 is a wasteful number, since it uses less digits than its factorization.

16891958213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899443.

The product of its digits is 933120, while the sum is 53.

The spelling of 16891958213 in words is "sixteen billion, eight hundred ninety-one million, nine hundred fifty-eight thousand, two hundred thirteen".