505162187945 has 4 divisors (see below), whose sum is σ = 606194625540. Its totient is φ = 404129750352.

The previous prime is 505162187941. The next prime is 505162187953. The reversal of 505162187945 is 549781261505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89173307161 + 415988880784 = 298619^2 + 644972^2 .

It is a cyclic number.

It is not a de Polignac number, because 505162187945 - 2² = 505162187941 is a prime.

It is a super-2 number, since 2×505162187945² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505162187941) 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, 50516218790 + ... + 50516218799.

It is an arithmetic number, because the mean of its divisors is an integer number (151548656385).

Almost surely, 2^505162187945 is an apocalyptic number.

It is an amenable number.

505162187945 is a deficient number, since it is larger than the sum of its proper divisors (101032437595).

505162187945 is a wasteful number, since it uses less digits than its factorization.

505162187945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101032437594.

The product of its (nonzero) digits is 3024000, while the sum is 53.

The spelling of 505162187945 in words is "five hundred five billion, one hundred sixty-two million, one hundred eighty-seven thousand, nine hundred forty-five".