185380920728819 has 2 divisors, whose sum is σ = 185380920728820. Its totient is φ = 185380920728818.

The previous prime is 185380920728767. The next prime is 185380920728827. The reversal of 185380920728819 is 918827029083581.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185380920728819 is a prime.

It is a super-2 number, since 2×185380920728819² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (185380920728849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92690460364409 + 92690460364410.

It is an arithmetic number, because the mean of its divisors is an integer number (92690460364410).

Almost surely, 2^{185380920728819} is an apocalyptic number.

185380920728819 is a deficient number, since it is larger than the sum of its proper divisors (1).

185380920728819 is an equidigital number, since it uses as much as digits as its factorization.

185380920728819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139345920, while the sum is 71.

The spelling of 185380920728819 in words is "one hundred eighty-five trillion, three hundred eighty billion, nine hundred twenty million, seven hundred twenty-eight thousand, eight hundred nineteen".