315116610644665 has 4 divisors (see below), whose sum is σ = 378139932773604. Its totient is φ = 252093288515728.

The previous prime is 315116610644603. The next prime is 315116610644677. The reversal of 315116610644665 is 566446016611513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 235637727446016 + 79478883198649 = 15350496^2 + 8915093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315116610644665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31511661064462 + ... + 31511661064471.

It is an arithmetic number, because the mean of its divisors is an integer number (94534983193401).

Almost surely, 2^{315116610644665} is an apocalyptic number.

It is an amenable number.

315116610644665 is a deficient number, since it is larger than the sum of its proper divisors (63023322128939).

315116610644665 is an equidigital number, since it uses as much as digits as its factorization.

315116610644665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63023322128938.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 315116610644665 in words is "three hundred fifteen trillion, one hundred sixteen billion, six hundred ten million, six hundred forty-four thousand, six hundred sixty-five".