165561150011946 has 32 divisors (see below), whose sum is σ = 356602458182208. Its totient is φ = 50940576311040.

The previous prime is 165561150011897. The next prime is 165561150011947. The reversal of 165561150011946 is 649110051165561.

165561150011946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165561150011947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24375820 + ... + 30418791.

It is an arithmetic number, because the mean of its divisors is an integer number (11143826818194).

Almost surely, 2^{165561150011946} is an apocalyptic number.

165561150011946 is an abundant number, since it is smaller than the sum of its proper divisors (191041308170262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165561150011946 is a wasteful number, since it uses less digits than its factorization.

165561150011946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54833366.

The product of its (nonzero) digits is 972000, while the sum is 51.

The spelling of 165561150011946 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty million, eleven thousand, nine hundred forty-six".