15872843249 has 2 divisors, whose sum is σ = 15872843250. Its totient is φ = 15872843248.

The previous prime is 15872843177. The next prime is 15872843297. The reversal of 15872843249 is 94234827851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15867937024 + 4906225 = 125968^2 + 2215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15872843249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15872843249.

It is not a weakly prime, because it can be changed into another prime (15872843299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7936421624 + 7936421625.

It is an arithmetic number, because the mean of its divisors is an integer number (7936421625).

Almost surely, 2^15872843249 is an apocalyptic number.

It is an amenable number.

15872843249 is a deficient number, since it is larger than the sum of its proper divisors (1).

15872843249 is an equidigital number, since it uses as much as digits as its factorization.

15872843249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 53.

The spelling of 15872843249 in words is "fifteen billion, eight hundred seventy-two million, eight hundred forty-three thousand, two hundred forty-nine".