12018177517 has 2 divisors, whose sum is σ = 12018177518. Its totient is φ = 12018177516.

The previous prime is 12018177487. The next prime is 12018177527. The reversal of 12018177517 is 71577181021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6280721001 + 5737456516 = 79251^2 + 75746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12018177517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12018177517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12018177527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009088758 + 6009088759.

It is an arithmetic number, because the mean of its divisors is an integer number (6009088759).

Almost surely, 2^12018177517 is an apocalyptic number.

It is an amenable number.

12018177517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12018177517 is an equidigital number, since it uses as much as digits as its factorization.

12018177517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27440, while the sum is 40.

It can be divided in two parts, 1201 and 8177517, that added together give a palindrome (8178718).

The spelling of 12018177517 in words is "twelve billion, eighteen million, one hundred seventy-seven thousand, five hundred seventeen".