16142091986 has 8 divisors (see below), whose sum is σ = 24217852284. Its totient is φ = 8069474560.

The previous prime is 16142091947. The next prime is 16142092007. The reversal of 16142091986 is 68919024161.

It can be written as a sum of positive squares in 2 ways, for example, as 16133826361 + 8265625 = 127019^2 + 2875^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16142091986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772835 + ... + 793446.

Almost surely, 2^16142091986 is an apocalyptic number.

16142091986 is a deficient number, since it is larger than the sum of its proper divisors (8075760298).

16142091986 is a wasteful number, since it uses less digits than its factorization.

16142091986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571436.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 16142091986 in words is "sixteen billion, one hundred forty-two million, ninety-one thousand, nine hundred eighty-six".