816027574891 has 2 divisors, whose sum is σ = 816027574892. Its totient is φ = 816027574890.

The previous prime is 816027574853. The next prime is 816027574919. The reversal of 816027574891 is 198475720618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816027574891 - 2¹⁵ = 816027542123 is a prime.

It is a super-2 number, since 2×816027574891² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (816027554891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408013787445 + 408013787446.

It is an arithmetic number, because the mean of its divisors is an integer number (408013787446).

Almost surely, 2^816027574891 is an apocalyptic number.

816027574891 is a deficient number, since it is larger than the sum of its proper divisors (1).

816027574891 is an equidigital number, since it uses as much as digits as its factorization.

816027574891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 816027574891 in words is "eight hundred sixteen billion, twenty-seven million, five hundred seventy-four thousand, eight hundred ninety-one".