165601061110516 has 12 divisors (see below), whose sum is σ = 299795024424420. Its totient is φ = 79945339846400.

The previous prime is 165601061110489. The next prime is 165601061110523. The reversal of 165601061110516 is 615011160106561.

It can be written as a sum of positive squares in 2 ways, for example, as 89859896466916 + 75741164643600 = 9479446^2 + 8702940^2 .

It is a super-2 number, since 2×165601061110516² (a number of 29 digits) contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 713797677085 + ... + 713797677316.

It is an arithmetic number, because the mean of its divisors is an integer number (24982918702035).

Almost surely, 2^{165601061110516} is an apocalyptic number.

It is an amenable number.

165601061110516 is a deficient number, since it is larger than the sum of its proper divisors (134193963313904).

165601061110516 is a wasteful number, since it uses less digits than its factorization.

165601061110516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427595354434 (or 1427595354432 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 165601061110516 in words is "one hundred sixty-five trillion, six hundred one billion, sixty-one million, one hundred ten thousand, five hundred sixteen".