16234536671891 has 16 divisors (see below), whose sum is σ = 17083638504000. Its totient is φ = 15397733818368.

The previous prime is 16234536671827. The next prime is 16234536671917. The reversal of 16234536671891 is 19817663543261.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16234536671891 - 2⁶ = 16234536671827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16234536601891) 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, 2127686 + ... + 6082443.

It is an arithmetic number, because the mean of its divisors is an integer number (1067727406500).

Almost surely, 2^{16234536671891} is an apocalyptic number.

16234536671891 is a deficient number, since it is larger than the sum of its proper divisors (849101832109).

16234536671891 is a wasteful number, since it uses less digits than its factorization.

16234536671891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8210878.

The product of its digits is 39191040, while the sum is 62.

The spelling of 16234536671891 in words is "sixteen trillion, two hundred thirty-four billion, five hundred thirty-six million, six hundred seventy-one thousand, eight hundred ninety-one".