163505118813 has 4 divisors (see below), whose sum is σ = 218006825088. Its totient is φ = 109003412540.

The previous prime is 163505118797. The next prime is 163505118827. The reversal of 163505118813 is 318811505361.

It is a happy number.

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 163505118813 - 2⁴ = 163505118797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163505114813) 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, 27250853133 + ... + 27250853138.

It is an arithmetic number, because the mean of its divisors is an integer number (54501706272).

Almost surely, 2^163505118813 is an apocalyptic number.

It is an amenable number.

163505118813 is a deficient number, since it is larger than the sum of its proper divisors (54501706275).

163505118813 is an equidigital number, since it uses as much as digits as its factorization.

163505118813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54501706274.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 163505118813 in words is "one hundred sixty-three billion, five hundred five million, one hundred eighteen thousand, eight hundred thirteen".