808240165531 has 2 divisors, whose sum is σ = 808240165532. Its totient is φ = 808240165530.

The previous prime is 808240165487. The next prime is 808240165561. The reversal of 808240165531 is 135561042808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 808240165531 - 2¹⁹ = 808239641243 is a prime.

It is a super-2 number, since 2×808240165531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (808240165561) 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, 404120082765 + 404120082766.

It is an arithmetic number, because the mean of its divisors is an integer number (404120082766).

Almost surely, 2^808240165531 is an apocalyptic number.

808240165531 is a deficient number, since it is larger than the sum of its proper divisors (1).

808240165531 is an equidigital number, since it uses as much as digits as its factorization.

808240165531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 808240165531 in words is "eight hundred eight billion, two hundred forty million, one hundred sixty-five thousand, five hundred thirty-one".