505404521605 has 32 divisors (see below), whose sum is σ = 650807942400. Its totient is φ = 375800020992.

The previous prime is 505404521569. The next prime is 505404521617. The reversal of 505404521605 is 506125404505.

It is a cyclic number.

It is not a de Polignac number, because 505404521605 - 2¹³ = 505404513413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3194866 + ... + 3349324.

It is an arithmetic number, because the mean of its divisors is an integer number (20337748200).

Almost surely, 2^505404521605 is an apocalyptic number.

It is an amenable number.

505404521605 is a deficient number, since it is larger than the sum of its proper divisors (145403420795).

505404521605 is a wasteful number, since it uses less digits than its factorization.

505404521605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155293.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 505404521605 in words is "five hundred five billion, four hundred four million, five hundred twenty-one thousand, six hundred five".