6315656840 has 16 divisors (see below), whose sum is σ = 14210227980. Its totient is φ = 2526262720.

The previous prime is 6315656839. The next prime is 6315656849. The reversal of 6315656840 is 486565136.

It can be written as a sum of positive squares in 2 ways, for example, as 5999741764 + 315915076 = 77458^2 + 17774^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6315656791 and 6315656800.

It is not an unprimeable number, because it can be changed into a prime (6315656849) 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, 78945671 + ... + 78945750.

Almost surely, 2^6315656840 is an apocalyptic number.

It is an amenable number.

6315656840 is an abundant number, since it is smaller than the sum of its proper divisors (7894571140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6315656840 is a wasteful number, since it uses less digits than its factorization.

6315656840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157891432 (or 157891428 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 6315656840 is about 79471.1069508913. The cubic root of 6315656840 is about 1848.4434767399.

The spelling of 6315656840 in words is "six billion, three hundred fifteen million, six hundred fifty-six thousand, eight hundred forty".