315555609569 has 2 divisors, whose sum is σ = 315555609570. Its totient is φ = 315555609568.

The previous prime is 315555609547. The next prime is 315555609659. The reversal of 315555609569 is 965906555513.

Together with next prime (315555609659) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276029398225 + 39526211344 = 525385^2 + 198812^2 .

It is a cyclic number.

It is not a de Polignac number, because 315555609569 - 2¹⁶ = 315555544033 is a prime.

It is a super-2 number, since 2×315555609569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315555609769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157777804784 + 157777804785.

It is an arithmetic number, because the mean of its divisors is an integer number (157777804785).

Almost surely, 2^315555609569 is an apocalyptic number.

It is an amenable number.

315555609569 is a deficient number, since it is larger than the sum of its proper divisors (1).

315555609569 is an equidigital number, since it uses as much as digits as its factorization.

315555609569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27337500, while the sum is 59.

The spelling of 315555609569 in words is "three hundred fifteen billion, five hundred fifty-five million, six hundred nine thousand, five hundred sixty-nine".