15851586513349 has 2 divisors, whose sum is σ = 15851586513350. Its totient is φ = 15851586513348.

The previous prime is 15851586513271. The next prime is 15851586513353. The reversal of 15851586513349 is 94331568515851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9727025717124 + 6124560796225 = 3118818^2 + 2474785^2 .

It is a cyclic number.

It is not a de Polignac number, because 15851586513349 - 2³¹ = 15849439029701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15851586513359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7925793256674 + 7925793256675.

It is an arithmetic number, because the mean of its divisors is an integer number (7925793256675).

Almost surely, 2^{15851586513349} is an apocalyptic number.

It is an amenable number.

15851586513349 is a deficient number, since it is larger than the sum of its proper divisors (1).

15851586513349 is an equidigital number, since it uses as much as digits as its factorization.

15851586513349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760000, while the sum is 64.

The spelling of 15851586513349 in words is "fifteen trillion, eight hundred fifty-one billion, five hundred eighty-six million, five hundred thirteen thousand, three hundred forty-nine".