15974729139 has 8 divisors (see below), whose sum is σ = 21660649920. Its totient is φ = 10469313896.

The previous prime is 15974729137. The next prime is 15974729149. The reversal of 15974729139 is 93192747951.

It is a happy number.

15974729139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 15974729139 - 2¹ = 15974729137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15974729137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45126177 + ... + 45126530.

It is an arithmetic number, because the mean of its divisors is an integer number (2707581240).

Almost surely, 2^15974729139 is an apocalyptic number.

15974729139 is a deficient number, since it is larger than the sum of its proper divisors (5685920781).

15974729139 is an equidigital number, since it uses as much as digits as its factorization.

15974729139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90252769.

The product of its digits is 4286520, while the sum is 57.

The spelling of 15974729139 in words is "fifteen billion, nine hundred seventy-four million, seven hundred twenty-nine thousand, one hundred thirty-nine".