506505021128 has 12 divisors (see below), whose sum is σ = 949700688945. Its totient is φ = 253251504080.

The previous prime is 506505021101. The next prime is 506505021149. The reversal of 506505021128 is 821120505605.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 413600761924 + 92904259204 = 643118^2 + 304802^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=503242.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1887158 + ... + 2138778.

Almost surely, 2^506505021128 is an apocalyptic number.

It is an amenable number.

506505021128 is a deficient number, since it is larger than the sum of its proper divisors (443195667817).

506505021128 is an frugal number, since it uses more digits than its factorization.

506505021128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503248 (or 251623 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 35.

The spelling of 506505021128 in words is "five hundred six billion, five hundred five million, twenty-one thousand, one hundred twenty-eight".