165161500061000 has 32 divisors (see below), whose sum is σ = 386477910145080. Its totient is φ = 66064600024000.

The previous prime is 165161500060987. The next prime is 165161500061009. The reversal of 165161500061000 is 160005161561.

It can be written as a sum of positive squares in 4 ways, for example, as 51317422849924 + 113844077211076 = 7163618^2 + 10669774^2 .

It is a super-2 number, since 2×165161500061000² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165161500061009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82580749031 + ... + 82580751030.

Almost surely, 2^{165161500061000} is an apocalyptic number.

165161500061000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165161500061000 is an abundant number, since it is smaller than the sum of its proper divisors (221316410084080).

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

165161500061000 is a wasteful number, since it uses less digits than its factorization.

165161500061000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165161500082 (or 165161500068 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 165161500061000 in words is "one hundred sixty-five trillion, one hundred sixty-one billion, five hundred million, sixty-one thousand".