18012877061 has 2 divisors, whose sum is σ = 18012877062. Its totient is φ = 18012877060.

The previous prime is 18012877009. The next prime is 18012877079. The reversal of 18012877061 is 16077821081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17996222500 + 16654561 = 134150^2 + 4081^2 .

It is a cyclic number.

It is not a de Polignac number, because 18012877061 - 2⁶ = 18012876997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18012877361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006438530 + 9006438531.

It is an arithmetic number, because the mean of its divisors is an integer number (9006438531).

Almost surely, 2^18012877061 is an apocalyptic number.

It is an amenable number.

18012877061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18012877061 is an equidigital number, since it uses as much as digits as its factorization.

18012877061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 41.

The spelling of 18012877061 in words is "eighteen billion, twelve million, eight hundred seventy-seven thousand, sixty-one".