1581246716131 has 2 divisors, whose sum is σ = 1581246716132. Its totient is φ = 1581246716130.

The previous prime is 1581246716081. The next prime is 1581246716149. The reversal of 1581246716131 is 1316176421851.

It is a strong prime.

It is an emirp because it is prime and its reverse (1316176421851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1581246716131 - 2¹¹ = 1581246714083 is a prime.

It is a super-2 number, since 2×1581246716131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1581246716531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790623358065 + 790623358066.

It is an arithmetic number, because the mean of its divisors is an integer number (790623358066).

Almost surely, 2^{1581246716131} is an apocalyptic number.

1581246716131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581246716131 is an equidigital number, since it uses as much as digits as its factorization.

1581246716131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The spelling of 1581246716131 in words is "one trillion, five hundred eighty-one billion, two hundred forty-six million, seven hundred sixteen thousand, one hundred thirty-one".