16139621913 has 4 divisors (see below), whose sum is σ = 21519495888. Its totient is φ = 10759747940.

The previous prime is 16139621909. The next prime is 16139621929. The reversal of 16139621913 is 31912693161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16139621913 - 2² = 16139621909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16139621933) 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, 2689936983 + ... + 2689936988.

It is an arithmetic number, because the mean of its divisors is an integer number (5379873972).

Almost surely, 2^16139621913 is an apocalyptic number.

It is an amenable number.

16139621913 is a deficient number, since it is larger than the sum of its proper divisors (5379873975).

16139621913 is an equidigital number, since it uses as much as digits as its factorization.

16139621913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379873974.

The product of its digits is 52488, while the sum is 42.

The spelling of 16139621913 in words is "sixteen billion, one hundred thirty-nine million, six hundred twenty-one thousand, nine hundred thirteen".