315659691209 has 2 divisors, whose sum is σ = 315659691210. Its totient is φ = 315659691208.

The previous prime is 315659691197. The next prime is 315659691253. The reversal of 315659691209 is 902196956513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308469160000 + 7190531209 = 555400^2 + 84797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315659691209 is a prime.

It is a super-2 number, since 2×315659691209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315659691299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157829845604 + 157829845605.

It is an arithmetic number, because the mean of its divisors is an integer number (157829845605).

Almost surely, 2^315659691209 is an apocalyptic number.

It is an amenable number.

315659691209 is a deficient number, since it is larger than the sum of its proper divisors (1).

315659691209 is an equidigital number, since it uses as much as digits as its factorization.

315659691209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3936600, while the sum is 56.

The spelling of 315659691209 in words is "three hundred fifteen billion, six hundred fifty-nine million, six hundred ninety-one thousand, two hundred nine".