1318586818653 has 40 divisors (see below), whose sum is σ = 2246039317368. Its totient is φ = 763706382336.

The previous prime is 1318586818609. The next prime is 1318586818657. The reversal of 1318586818653 is 3568186858131.

1318586818653 is a `hidden beast` number, since 1 + 31 + 8 + 586 + 8 + 18 + 6 + 5 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 190398704409 + 1128188114244 = 436347^2 + 1062162^2 .

It is not a de Polignac number, because 1318586818653 - 2⁶ = 1318586818589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318586818657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36812076 + ... + 36847877.

Almost surely, 2^{1318586818653} is an apocalyptic number.

1318586818653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1318586818653 is a deficient number, since it is larger than the sum of its proper divisors (927452498715).

1318586818653 is a wasteful number, since it uses less digits than its factorization.

1318586818653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73659995 (or 73659986 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

The spelling of 1318586818653 in words is "one trillion, three hundred eighteen billion, five hundred eighty-six million, eight hundred eighteen thousand, six hundred fifty-three".