1581380159071 has 2 divisors, whose sum is σ = 1581380159072. Its totient is φ = 1581380159070.

The previous prime is 1581380159039. The next prime is 1581380159081. The reversal of 1581380159071 is 1709510831851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1581380159071 - 2⁵ = 1581380159039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1581380159011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790690079535 + 790690079536.

It is an arithmetic number, because the mean of its divisors is an integer number (790690079536).

Almost surely, 2^{1581380159071} is an apocalyptic number.

1581380159071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581380159071 is an equidigital number, since it uses as much as digits as its factorization.

1581380159071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 49.

The spelling of 1581380159071 in words is "one trillion, five hundred eighty-one billion, three hundred eighty million, one hundred fifty-nine thousand, seventy-one".