185845647641 has 2 divisors, whose sum is σ = 185845647642. Its totient is φ = 185845647640.

The previous prime is 185845647619. The next prime is 185845647667. The reversal of 185845647641 is 146746548581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171979407616 + 13866240025 = 414704^2 + 117755^2 .

It is a cyclic number.

It is not a de Polignac number, because 185845647641 - 2¹⁸ = 185845385497 is a prime.

It is not a weakly prime, because it can be changed into another prime (185845647601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92922823820 + 92922823821.

It is an arithmetic number, because the mean of its divisors is an integer number (92922823821).

Almost surely, 2^185845647641 is an apocalyptic number.

It is an amenable number.

185845647641 is a deficient number, since it is larger than the sum of its proper divisors (1).

185845647641 is an equidigital number, since it uses as much as digits as its factorization.

185845647641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25804800, while the sum is 59.

The spelling of 185845647641 in words is "one hundred eighty-five billion, eight hundred forty-five million, six hundred forty-seven thousand, six hundred forty-one".