15873157315849 has 2 divisors, whose sum is σ = 15873157315850. Its totient is φ = 15873157315848.

The previous prime is 15873157315819. The next prime is 15873157315877. The reversal of 15873157315849 is 94851375137851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12407442656400 + 3465714659449 = 3522420^2 + 1861643^2 .

It is a cyclic number.

It is not a de Polignac number, because 15873157315849 - 2²³ = 15873148927241 is a prime.

It is not a weakly prime, because it can be changed into another prime (15873157315819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7936578657924 + 7936578657925.

It is an arithmetic number, because the mean of its divisors is an integer number (7936578657925).

Almost surely, 2^{15873157315849} is an apocalyptic number.

It is an amenable number.

15873157315849 is a deficient number, since it is larger than the sum of its proper divisors (1).

15873157315849 is an equidigital number, since it uses as much as digits as its factorization.

15873157315849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008000, while the sum is 67.

The spelling of 15873157315849 in words is "fifteen trillion, eight hundred seventy-three billion, one hundred fifty-seven million, three hundred fifteen thousand, eight hundred forty-nine".