16007878891 has 4 divisors (see below), whose sum is σ = 16008652800. Its totient is φ = 16007104984.

The previous prime is 16007878819. The next prime is 16007878933. The reversal of 16007878891 is 19887870061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19887870061 = 15803 ⋅1258487.

It is a cyclic number.

It is not a de Polignac number, because 16007878891 - 2⁷ = 16007878763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16007878291) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 355051 + ... + 397588.

It is an arithmetic number, because the mean of its divisors is an integer number (4002163200).

Almost surely, 2^16007878891 is an apocalyptic number.

16007878891 is a deficient number, since it is larger than the sum of its proper divisors (773909).

16007878891 is an equidigital number, since it uses as much as digits as its factorization.

16007878891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773908.

The product of its (nonzero) digits is 1354752, while the sum is 55.

The spelling of 16007878891 in words is "sixteen billion, seven million, eight hundred seventy-eight thousand, eight hundred ninety-one".