505406210506 has 4 divisors (see below), whose sum is σ = 758109315762. Its totient is φ = 252703105252.

The previous prime is 505406210497. The next prime is 505406210509. The reversal of 505406210506 is 605012604505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 421059529881 + 84346680625 = 648891^2 + 290425^2 .

It is not an unprimeable number, because it can be changed into a prime (505406210509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126351552625 + ... + 126351552628.

Almost surely, 2^505406210506 is an apocalyptic number.

505406210506 is a deficient number, since it is larger than the sum of its proper divisors (252703105256).

505406210506 is a wasteful number, since it uses less digits than its factorization.

505406210506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252703105255.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 505406210506 in words is "five hundred five billion, four hundred six million, two hundred ten thousand, five hundred six".