1315947865388 has 48 divisors (see below), whose sum is σ = 2696912666784. Its totient is φ = 556183895040.

The previous prime is 1315947865387. The next prime is 1315947865457. The reversal of 1315947865388 is 8835687495131.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is not an unprimeable number, because it can be changed into a prime (1315947865381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20083898 + ... + 20149313.

It is an arithmetic number, because the mean of its divisors is an integer number (56185680558).

Almost surely, 2^{1315947865388} is an apocalyptic number.

It is an amenable number.

1315947865388 is an abundant number, since it is smaller than the sum of its proper divisors (1380964801396).

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

1315947865388 is a wasteful number, since it uses less digits than its factorization.

1315947865388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40233282 (or 40233280 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 68.

The spelling of 1315947865388 in words is "one trillion, three hundred fifteen billion, nine hundred forty-seven million, eight hundred sixty-five thousand, three hundred eighty-eight".