165151561155512 has 8 divisors (see below), whose sum is σ = 309659177166600. Its totient is φ = 82575780577752.

The previous prime is 165151561155509. The next prime is 165151561155533. The reversal of 165151561155512 is 215551165151561.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10321972572212 + ... + 10321972572227.

It is an arithmetic number, because the mean of its divisors is an integer number (38707397145825).

Almost surely, 2^{165151561155512} is an apocalyptic number.

It is an amenable number.

165151561155512 is a deficient number, since it is larger than the sum of its proper divisors (144507616011088).

165151561155512 is a wasteful number, since it uses less digits than its factorization.

165151561155512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20643945144445 (or 20643945144441 counting only the distinct ones).

The product of its digits is 1125000, while the sum is 50.

The spelling of 165151561155512 in words is "one hundred sixty-five trillion, one hundred fifty-one billion, five hundred sixty-one million, one hundred fifty-five thousand, five hundred twelve".