1318785518203 has 2 divisors, whose sum is σ = 1318785518204. Its totient is φ = 1318785518202.

The previous prime is 1318785518177. The next prime is 1318785518209. The reversal of 1318785518203 is 3028155878131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1318785518203 - 2¹³ = 1318785510011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1318785518209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659392759101 + 659392759102.

It is an arithmetic number, because the mean of its divisors is an integer number (659392759102).

Almost surely, 2^{1318785518203} is an apocalyptic number.

1318785518203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318785518203 is an equidigital number, since it uses as much as digits as its factorization.

1318785518203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 1318785518203 in words is "one trillion, three hundred eighteen billion, seven hundred eighty-five million, five hundred eighteen thousand, two hundred three".