165601005161100 has 72 divisors (see below), whose sum is σ = 504356745560640. Its totient is φ = 41836043407680.

The previous prime is 165601005161099. The next prime is 165601005161143. The reversal of 165601005161100 is 1161500106561.

165601005161100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×165601005161100³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14526398262 + ... + 14526409661.

Almost surely, 2^{165601005161100} is an apocalyptic number.

165601005161100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165601005161100 is an abundant number, since it is smaller than the sum of its proper divisors (338755740399540).

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

165601005161100 is a wasteful number, since it uses less digits than its factorization.

165601005161100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29052807959 (or 29052807952 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 33.

Adding to 165601005161100 its reverse (1161500106561), we get a palindrome (166762505267661).

The spelling of 165601005161100 in words is "one hundred sixty-five trillion, six hundred one billion, five million, one hundred sixty-one thousand, one hundred".