505554873931 has 2 divisors, whose sum is σ = 505554873932. Its totient is φ = 505554873930.

The previous prime is 505554873877. The next prime is 505554873937. The reversal of 505554873931 is 139378455505.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505554873931 - 2⁹ = 505554873419 is a prime.

It is a super-2 number, since 2×505554873931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505554873937) 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, 252777436965 + 252777436966.

It is an arithmetic number, because the mean of its divisors is an integer number (252777436966).

Almost surely, 2^505554873931 is an apocalyptic number.

505554873931 is a deficient number, since it is larger than the sum of its proper divisors (1).

505554873931 is an equidigital number, since it uses as much as digits as its factorization.

505554873931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340000, while the sum is 55.

The spelling of 505554873931 in words is "five hundred five billion, five hundred fifty-four million, eight hundred seventy-three thousand, nine hundred thirty-one".