1318615648 has 24 divisors (see below), whose sum is σ = 2966885712. Its totient is φ = 565120896.

The previous prime is 1318615643. The next prime is 1318615651. The reversal of 1318615648 is 8465168131.

It is a super-3 number, since 3×1318615648³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318615643) 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, 2943115 + ... + 2943562.

It is an arithmetic number, because the mean of its divisors is an integer number (123620238).

Almost surely, 2^1318615648 is an apocalyptic number.

It is an amenable number.

1318615648 is an abundant number, since it is smaller than the sum of its proper divisors (1648270064).

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

1318615648 is an equidigital number, since it uses as much as digits as its factorization.

1318615648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5886694 (or 5886686 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 1318615648 is about 36312.7477340947. The cubic root of 1318615648 is about 1096.5776964045.

The spelling of 1318615648 in words is "one billion, three hundred eighteen million, six hundred fifteen thousand, six hundred forty-eight".