506036515621 has 18 divisors (see below), whose sum is σ = 637419029202. Its totient is φ = 400380533280.

The previous prime is 506036515553. The next prime is 506036515657. The reversal of 506036515621 is 126515630605.

It can be written as a sum of positive squares in 3 ways, for example, as 3977824900 + 502058690721 = 63070^2 + 708561^2 .

It is not a de Polignac number, because 506036515621 - 2⁹ = 506036515109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506036515661) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30545790 + ... + 30562351.

It is an arithmetic number, because the mean of its divisors is an integer number (35412168289).

Almost surely, 2^506036515621 is an apocalyptic number.

It is an amenable number.

506036515621 is a deficient number, since it is larger than the sum of its proper divisors (131382513581).

506036515621 is a wasteful number, since it uses less digits than its factorization.

506036515621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61108181 (or 61108161 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 506036515621 in words is "five hundred six billion, thirty-six million, five hundred fifteen thousand, six hundred twenty-one".