163442515503545 has 4 divisors (see below), whose sum is σ = 196131018604260. Its totient is φ = 130754012402832.

The previous prime is 163442515503541. The next prime is 163442515503593. The reversal of 163442515503545 is 545305515244361.

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 58017653092624 + 105424862410921 = 7616932^2 + 10267661^2 .

It is a cyclic number.

It is not a de Polignac number, because 163442515503545 - 2² = 163442515503541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163442515503541) 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, 16344251550350 + ... + 16344251550359.

It is an arithmetic number, because the mean of its divisors is an integer number (49032754651065).

Almost surely, 2^{163442515503545} is an apocalyptic number.

It is an amenable number.

163442515503545 is a deficient number, since it is larger than the sum of its proper divisors (32688503100715).

163442515503545 is an equidigital number, since it uses as much as digits as its factorization.

163442515503545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32688503100714.

The product of its (nonzero) digits is 21600000, while the sum is 53.

The spelling of 163442515503545 in words is "one hundred sixty-three trillion, four hundred forty-two billion, five hundred fifteen million, five hundred three thousand, five hundred forty-five".