505155561073 has 4 divisors (see below), whose sum is σ = 505157029360. Its totient is φ = 505154092788.

The previous prime is 505155561059. The next prime is 505155561077. The reversal of 505155561073 is 370165551505.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505155561073 is a prime.

It is a super-2 number, since 2×505155561073² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505155561077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91258 + ... + 1009276.

It is an arithmetic number, because the mean of its divisors is an integer number (126289257340).

Almost surely, 2^505155561073 is an apocalyptic number.

It is an amenable number.

505155561073 is a deficient number, since it is larger than the sum of its proper divisors (1468287).

505155561073 is an equidigital number, since it uses as much as digits as its factorization.

505155561073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468286.

The product of its (nonzero) digits is 393750, while the sum is 43.

The spelling of 505155561073 in words is "five hundred five billion, one hundred fifty-five million, five hundred sixty-one thousand, seventy-three".