186145295549 has 2 divisors, whose sum is σ = 186145295550. Its totient is φ = 186145295548.

The previous prime is 186145295533. The next prime is 186145295569. The reversal of 186145295549 is 945592541681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131163487225 + 54981808324 = 362165^2 + 234482^2 .

It is a cyclic number.

It is not a de Polignac number, because 186145295549 - 2⁴ = 186145295533 is a prime.

It is a super-2 number, since 2×186145295549² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186145295569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93072647774 + 93072647775.

It is an arithmetic number, because the mean of its divisors is an integer number (93072647775).

Almost surely, 2^186145295549 is an apocalyptic number.

It is an amenable number.

186145295549 is a deficient number, since it is larger than the sum of its proper divisors (1).

186145295549 is an equidigital number, since it uses as much as digits as its factorization.

186145295549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552000, while the sum is 59.

The spelling of 186145295549 in words is "one hundred eighty-six billion, one hundred forty-five million, two hundred ninety-five thousand, five hundred forty-nine".