161163815555012 has 12 divisors (see below), whose sum is σ = 282038955644796. Its totient is φ = 80581256799360.

The previous prime is 161163815554879. The next prime is 161163815555047. The reversal of 161163815555012 is 210555518361161.

It can be written as a sum of positive squares in 2 ways, for example, as 45662238523456 + 115501577031556 = 6757384^2 + 10747166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162187289 + ... + 163177952.

It is an arithmetic number, because the mean of its divisors is an integer number (23503246303733).

Almost surely, 2^{161163815555012} is an apocalyptic number.

It is an amenable number.

161163815555012 is a deficient number, since it is larger than the sum of its proper divisors (120875140089784).

161163815555012 is a wasteful number, since it uses less digits than its factorization.

161163815555012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325489078 (or 325489076 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 50.

The spelling of 161163815555012 in words is "one hundred sixty-one trillion, one hundred sixty-three billion, eight hundred fifteen million, five hundred fifty-five thousand, twelve".