315786242081 has 2 divisors, whose sum is σ = 315786242082. Its totient is φ = 315786242080.

The previous prime is 315786242059. The next prime is 315786242111. The reversal of 315786242081 is 180242687513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223861459600 + 91924782481 = 473140^2 + 303191^2 .

It is a cyclic number.

It is not a de Polignac number, because 315786242081 - 2⁶ = 315786242017 is a prime.

It is a super-2 number, since 2×315786242081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315786242041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157893121040 + 157893121041.

It is an arithmetic number, because the mean of its divisors is an integer number (157893121041).

Almost surely, 2^315786242081 is an apocalyptic number.

It is an amenable number.

315786242081 is a deficient number, since it is larger than the sum of its proper divisors (1).

315786242081 is an equidigital number, since it uses as much as digits as its factorization.

315786242081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 315786242081 in words is "three hundred fifteen billion, seven hundred eighty-six million, two hundred forty-two thousand, eighty-one".