15721348439 has 2 divisors, whose sum is σ = 15721348440. Its totient is φ = 15721348438.

The previous prime is 15721348393. The next prime is 15721348459. The reversal of 15721348439 is 93484312751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15721348439 - 2¹⁶ = 15721282903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15721348393 and 15721348402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15721348459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7860674219 + 7860674220.

It is an arithmetic number, because the mean of its divisors is an integer number (7860674220).

Almost surely, 2^15721348439 is an apocalyptic number.

15721348439 is a deficient number, since it is larger than the sum of its proper divisors (1).

15721348439 is an equidigital number, since it uses as much as digits as its factorization.

15721348439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The spelling of 15721348439 in words is "fifteen billion, seven hundred twenty-one million, three hundred forty-eight thousand, four hundred thirty-nine".