816431552933 has 2 divisors, whose sum is σ = 816431552934. Its totient is φ = 816431552932.

The previous prime is 816431552921. The next prime is 816431553011. The reversal of 816431552933 is 339255134618.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677068956964 + 139362595969 = 822842^2 + 373313^2 .

It is a cyclic number.

It is not a de Polignac number, because 816431552933 - 2⁶ = 816431552869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816431582933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408215776466 + 408215776467.

It is an arithmetic number, because the mean of its divisors is an integer number (408215776467).

Almost surely, 2^816431552933 is an apocalyptic number.

It is an amenable number.

816431552933 is a deficient number, since it is larger than the sum of its proper divisors (1).

816431552933 is an equidigital number, since it uses as much as digits as its factorization.

816431552933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 50.

The spelling of 816431552933 in words is "eight hundred sixteen billion, four hundred thirty-one million, five hundred fifty-two thousand, nine hundred thirty-three".