506469681 has 24 divisors (see below), whose sum is σ = 771854720. Its totient is φ = 319134816.

The previous prime is 506469647. The next prime is 506469709. The reversal of 506469681 is 186964605.

506469681 is a `hidden beast` number, since 506 + 4 + 69 + 6 + 81 = 666.

It is not a de Polignac number, because 506469681 - 2⁶ = 506469617 is a prime.

It is a super-2 number, since 2×506469681² = 513023075544483522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506469611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75975 + ... + 82371.

Almost surely, 2^506469681 is an apocalyptic number.

It is an amenable number.

506469681 is a deficient number, since it is larger than the sum of its proper divisors (265385039).

506469681 is a wasteful number, since it uses less digits than its factorization.

506469681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885 (or 6882 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 506469681 is about 22504.8812705155. The cubic root of 506469681 is about 797.1091921404.

The spelling of 506469681 in words is "five hundred six million, four hundred sixty-nine thousand, six hundred eighty-one".