185640912007 has 2 divisors, whose sum is σ = 185640912008. Its totient is φ = 185640912006.

The previous prime is 185640911983. The next prime is 185640912013. The reversal of 185640912007 is 700219046581.

It is a strong prime.

It is an emirp because it is prime and its reverse (700219046581) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185640912007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185640912047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92820456003 + 92820456004.

It is an arithmetic number, because the mean of its divisors is an integer number (92820456004).

Almost surely, 2^185640912007 is an apocalyptic number.

185640912007 is a deficient number, since it is larger than the sum of its proper divisors (1).

185640912007 is an equidigital number, since it uses as much as digits as its factorization.

185640912007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

Adding to 185640912007 its reverse (700219046581), we get a palindrome (885859958588).

The spelling of 185640912007 in words is "one hundred eighty-five billion, six hundred forty million, nine hundred twelve thousand, seven".