507638422881 has 6 divisors (see below), whose sum is σ = 733255499730. Its totient is φ = 338425615248.

The previous prime is 507638422877. The next prime is 507638422943. The reversal of 507638422881 is 188224836705.

507638422881 is a `hidden beast` number, since 507 + 6 + 38 + 4 + 2 + 28 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 499926773025 + 7711649856 = 707055^2 + 87816^2 .

It is not a de Polignac number, because 507638422881 - 2² = 507638422877 is a prime.

It is a super-2 number, since 2×507638422881² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (507638426881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28202134596 + ... + 28202134613.

It is an arithmetic number, because the mean of its divisors is an integer number (122209249955).

Almost surely, 2^507638422881 is an apocalyptic number.

It is an amenable number.

507638422881 is a deficient number, since it is larger than the sum of its proper divisors (225617076849).

507638422881 is a wasteful number, since it uses less digits than its factorization.

507638422881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56404269215 (or 56404269212 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 507638422881 in words is "five hundred seven billion, six hundred thirty-eight million, four hundred twenty-two thousand, eight hundred eighty-one".