16139898937 has 4 divisors (see below), whose sum is σ = 16221827556. Its totient is φ = 16057970320.

The previous prime is 16139898913. The next prime is 16139898947. The reversal of 16139898937 is 73989893161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73989893161 = 499 ⋅148276339.

It can be written as a sum of positive squares in 2 ways, for example, as 16012118521 + 127780416 = 126539^2 + 11304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16139898937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16139898947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40964014 + ... + 40964407.

It is an arithmetic number, because the mean of its divisors is an integer number (4055456889).

Almost surely, 2^16139898937 is an apocalyptic number.

It is an amenable number.

16139898937 is a deficient number, since it is larger than the sum of its proper divisors (81928619).

16139898937 is an equidigital number, since it uses as much as digits as its factorization.

16139898937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81928618.

The product of its digits is 17635968, while the sum is 64.

The spelling of 16139898937 in words is "sixteen billion, one hundred thirty-nine million, eight hundred ninety-eight thousand, nine hundred thirty-seven".