505060115561 has 4 divisors (see below), whose sum is σ = 505064951952. Its totient is φ = 505055279172.

The previous prime is 505060115543. The next prime is 505060115563. The reversal of 505060115561 is 165511060505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505060115561 - 2²⁶ = 504993006697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505060115563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258015 + ... + 2471588.

It is an arithmetic number, because the mean of its divisors is an integer number (126266237988).

Almost surely, 2^505060115561 is an apocalyptic number.

It is an amenable number.

505060115561 is a deficient number, since it is larger than the sum of its proper divisors (4836391).

505060115561 is a wasteful number, since it uses less digits than its factorization.

505060115561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836390.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 505060115561 in words is "five hundred five billion, sixty million, one hundred fifteen thousand, five hundred sixty-one".