506423451881 has 2 divisors, whose sum is σ = 506423451882. Its totient is φ = 506423451880.

The previous prime is 506423451841. The next prime is 506423451907. The reversal of 506423451881 is 188154324605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259752296281 + 246671155600 = 509659^2 + 496660^2 .

It is a cyclic number.

It is not a de Polignac number, because 506423451881 - 2⁶ = 506423451817 is a prime.

It is a super-2 number, since 2×506423451881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (506423451841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253211725940 + 253211725941.

It is an arithmetic number, because the mean of its divisors is an integer number (253211725941).

Almost surely, 2^506423451881 is an apocalyptic number.

It is an amenable number.

506423451881 is a deficient number, since it is larger than the sum of its proper divisors (1).

506423451881 is an equidigital number, since it uses as much as digits as its factorization.

506423451881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 47.

It can be divided in two parts, 5064234 and 51881, that added together give a palindrome (5116115).

The spelling of 506423451881 in words is "five hundred six billion, four hundred twenty-three million, four hundred fifty-one thousand, eight hundred eighty-one".