315615657085 has 4 divisors (see below), whose sum is σ = 378738788508. Its totient is φ = 252492525664.

The previous prime is 315615656947. The next prime is 315615657089. The reversal of 315615657085 is 580756516513.

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 186138747844 + 129476909241 = 431438^2 + 359829^2 .

It is a cyclic number.

It is not a de Polignac number, because 315615657085 - 2¹⁷ = 315615526013 is a prime.

It is a super-2 number, since 2×315615657085² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315615657089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31561565704 + ... + 31561565713.

It is an arithmetic number, because the mean of its divisors is an integer number (94684697127).

Almost surely, 2^315615657085 is an apocalyptic number.

It is an amenable number.

315615657085 is a deficient number, since it is larger than the sum of its proper divisors (63123131423).

315615657085 is an equidigital number, since it uses as much as digits as its factorization.

315615657085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63123131422.

The product of its (nonzero) digits is 3780000, while the sum is 52.

The spelling of 315615657085 in words is "three hundred fifteen billion, six hundred fifteen million, six hundred fifty-seven thousand, eighty-five".