2118613761877 has 2 divisors, whose sum is σ = 2118613761878. Its totient is φ = 2118613761876.

The previous prime is 2118613761853. The next prime is 2118613761917. The reversal of 2118613761877 is 7781673168112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2112368653201 + 6245108676 = 1453399^2 + 79026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2118613761877 is a prime.

It is a super-2 number, since 2×2118613761877² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118613731877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059306880938 + 1059306880939.

It is an arithmetic number, because the mean of its divisors is an integer number (1059306880939).

Almost surely, 2^{2118613761877} is an apocalyptic number.

It is an amenable number.

2118613761877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118613761877 is an equidigital number, since it uses as much as digits as its factorization.

2118613761877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 58.

The spelling of 2118613761877 in words is "two trillion, one hundred eighteen billion, six hundred thirteen million, seven hundred sixty-one thousand, eight hundred seventy-seven".