18585152611813 has 2 divisors, whose sum is σ = 18585152611814. Its totient is φ = 18585152611812.

The previous prime is 18585152611799. The next prime is 18585152611843. The reversal of 18585152611813 is 31811625158581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18554444255169 + 30708356644 = 4307487^2 + 175238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18585152611813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18585152611843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9292576305906 + 9292576305907.

It is an arithmetic number, because the mean of its divisors is an integer number (9292576305907).

Almost surely, 2^{18585152611813} is an apocalyptic number.

It is an amenable number.

18585152611813 is a deficient number, since it is larger than the sum of its proper divisors (1).

18585152611813 is an equidigital number, since it uses as much as digits as its factorization.

18585152611813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304000, while the sum is 55.

The spelling of 18585152611813 in words is "eighteen trillion, five hundred eighty-five billion, one hundred fifty-two million, six hundred eleven thousand, eight hundred thirteen".