18764128088669 has 2 divisors, whose sum is σ = 18764128088670. Its totient is φ = 18764128088668.

The previous prime is 18764128088627. The next prime is 18764128088681. The reversal of 18764128088669 is 96688082146781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10292611404100 + 8471516684569 = 3208210^2 + 2910587^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18764128088669 is a prime.

It is a super-2 number, since 2×18764128088669² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18764128088596 and 18764128088605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18764128088369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9382064044334 + 9382064044335.

It is an arithmetic number, because the mean of its divisors is an integer number (9382064044335).

Almost surely, 2^{18764128088669} is an apocalyptic number.

It is an amenable number.

18764128088669 is a deficient number, since it is larger than the sum of its proper divisors (1).

18764128088669 is an equidigital number, since it uses as much as digits as its factorization.

18764128088669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 445906944, while the sum is 74.

The spelling of 18764128088669 in words is "eighteen trillion, seven hundred sixty-four billion, one hundred twenty-eight million, eighty-eight thousand, six hundred sixty-nine".