16721462091 has 8 divisors (see below), whose sum is σ = 22432064320. Its totient is φ = 11079250632.

The previous prime is 16721462039. The next prime is 16721462113. The reversal of 16721462091 is 19026412761.

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

It is not a de Polignac number, because 16721462091 - 2⁶ = 16721462027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16721462011) 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, 17097121 + ... + 17098098.

It is an arithmetic number, because the mean of its divisors is an integer number (2804008040).

Almost surely, 2^16721462091 is an apocalyptic number.

16721462091 is a deficient number, since it is larger than the sum of its proper divisors (5710602229).

16721462091 is a wasteful number, since it uses less digits than its factorization.

16721462091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34195385.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 16721462091 in words is "sixteen billion, seven hundred twenty-one million, four hundred sixty-two thousand, ninety-one".