1580079315781 has 2 divisors, whose sum is σ = 1580079315782. Its totient is φ = 1580079315780.

The previous prime is 1580079315767. The next prime is 1580079315889. The reversal of 1580079315781 is 1875139700851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1167156122500 + 412923193281 = 1080350^2 + 642591^2 .

It is an emirp because it is prime and its reverse (1875139700851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1580079315781 - 2¹⁷ = 1580079184709 is a prime.

It is a super-2 number, since 2×1580079315781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1580079315721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790039657890 + 790039657891.

It is an arithmetic number, because the mean of its divisors is an integer number (790039657891).

Almost surely, 2^{1580079315781} is an apocalyptic number.

It is an amenable number.

1580079315781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1580079315781 is an equidigital number, since it uses as much as digits as its factorization.

1580079315781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 55.

The spelling of 1580079315781 in words is "one trillion, five hundred eighty billion, seventy-nine million, three hundred fifteen thousand, seven hundred eighty-one".