1318207652893 has 4 divisors (see below), whose sum is σ = 1318623625660. Its totient is φ = 1317791680128.

The previous prime is 1318207652843. The next prime is 1318207652911. The reversal of 1318207652893 is 3982567028131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 447724250884 + 870483402009 = 669122^2 + 932997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318207652893 - 2¹⁷ = 1318207521821 is a prime.

It is a super-2 number, since 2×1318207652893² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318207652803) 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 3 ways as a sum of consecutive naturals, for example, 207981630 + ... + 207987967.

It is an arithmetic number, because the mean of its divisors is an integer number (329655906415).

Almost surely, 2^{1318207652893} is an apocalyptic number.

It is an amenable number.

1318207652893 is a deficient number, since it is larger than the sum of its proper divisors (415972767).

1318207652893 is an equidigital number, since it uses as much as digits as its factorization.

1318207652893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415972766.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 1318207652893 in words is "one trillion, three hundred eighteen billion, two hundred seven million, six hundred fifty-two thousand, eight hundred ninety-three".