6315661513 has 4 divisors (see below), whose sum is σ = 7217898880. Its totient is φ = 5413424148.

The previous prime is 6315661501. The next prime is 6315661531. The reversal of 6315661513 is 3151665136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6315661513 - 2²⁵ = 6282107081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6315661543) 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, 451118673 + ... + 451118686.

It is an arithmetic number, because the mean of its divisors is an integer number (1804474720).

Almost surely, 2^6315661513 is an apocalyptic number.

It is an amenable number.

6315661513 is a deficient number, since it is larger than the sum of its proper divisors (902237367).

6315661513 is an equidigital number, since it uses as much as digits as its factorization.

6315661513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902237366.

The product of its digits is 48600, while the sum is 37.

The square root of 6315661513 is about 79471.1363515081. The cubic root of 6315661513 is about 1848.4439326320.

The spelling of 6315661513 in words is "six billion, three hundred fifteen million, six hundred sixty-one thousand, five hundred thirteen".