505506165615 has 24 divisors (see below), whose sum is σ = 955866205008. Its totient is φ = 245093898240.

The previous prime is 505506165613. The next prime is 505506165629. The reversal of 505506165615 is 516561605505.

It is not a de Polignac number, because 505506165615 - 2¹ = 505506165613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505506165611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 510611794 + ... + 510612783.

It is an arithmetic number, because the mean of its divisors is an integer number (39827758542).

Almost surely, 2^505506165615 is an apocalyptic number.

505506165615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

505506165615 is a deficient number, since it is larger than the sum of its proper divisors (450360039393).

505506165615 is a wasteful number, since it uses less digits than its factorization.

505506165615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021224599 (or 1021224596 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 505506165615 in words is "five hundred five billion, five hundred six million, one hundred sixty-five thousand, six hundred fifteen".