16139646797 has 4 divisors (see below), whose sum is σ = 16139950716. Its totient is φ = 16139342880.

The previous prime is 16139646781. The next prime is 16139646811. The reversal of 16139646797 is 79764693161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7904810281 + 8234836516 = 88909^2 + 90746^2 .

It is a cyclic number.

It is not a de Polignac number, because 16139646797 - 2⁴ = 16139646781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16139646737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49088 + ... + 186249.

It is an arithmetic number, because the mean of its divisors is an integer number (4034987679).

Almost surely, 2^16139646797 is an apocalyptic number.

It is an amenable number.

16139646797 is a deficient number, since it is larger than the sum of its proper divisors (303919).

16139646797 is an equidigital number, since it uses as much as digits as its factorization.

16139646797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303918.

The product of its digits is 10287648, while the sum is 59.

The spelling of 16139646797 in words is "sixteen billion, one hundred thirty-nine million, six hundred forty-six thousand, seven hundred ninety-seven".