186064011521 has 2 divisors, whose sum is σ = 186064011522. Its totient is φ = 186064011520.

The previous prime is 186064011503. The next prime is 186064011583. The reversal of 186064011521 is 125110460681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134971738225 + 51092273296 = 367385^2 + 226036^2 .

It is a cyclic number.

It is not a de Polignac number, because 186064011521 - 2¹⁰ = 186064010497 is a prime.

It is not a weakly prime, because it can be changed into another prime (186064011121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93032005760 + 93032005761.

It is an arithmetic number, because the mean of its divisors is an integer number (93032005761).

Almost surely, 2^186064011521 is an apocalyptic number.

It is an amenable number.

186064011521 is a deficient number, since it is larger than the sum of its proper divisors (1).

186064011521 is an equidigital number, since it uses as much as digits as its factorization.

186064011521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 186064011521 in words is "one hundred eighty-six billion, sixty-four million, eleven thousand, five hundred twenty-one".