505540045504 has 168 divisors, whose sum is σ = 1146744407040. Its totient is φ = 220410657792.

The previous prime is 505540045499. The next prime is 505540045553. The reversal of 505540045504 is 405540045505.

It is a super-2 number, since 2×505540045504² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75416617 + ... + 75423319.

Almost surely, 2^505540045504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505540045504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573372203520).

505540045504 is an abundant number, since it is smaller than the sum of its proper divisors (641204361536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505540045504 is a wasteful number, since it uses less digits than its factorization.

505540045504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127 (or 7104 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 37.

Subtracting from 505540045504 its reverse (405540045505), we obtain a palindrome (99999999999).

The spelling of 505540045504 in words is "five hundred five billion, five hundred forty million, forty-five thousand, five hundred four".