165155403687672 has 64 divisors (see below), whose sum is σ = 414727545657600. Its totient is φ = 54807106694400.

The previous prime is 165155403687647. The next prime is 165155403687679. The reversal of 165155403687672 is 276786304551561.

It is a happy number.

165155403687672 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165155403687679) 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, 10768918 + ... + 21125349.

It is an arithmetic number, because the mean of its divisors is an integer number (6480117900900).

Almost surely, 2^{165155403687672} is an apocalyptic number.

165155403687672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165155403687672 is an abundant number, since it is smaller than the sum of its proper divisors (249572141969928).

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

165155403687672 is a wasteful number, since it uses less digits than its factorization.

165155403687672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31895236 (or 31895232 counting only the distinct ones).

The product of its (nonzero) digits is 254016000, while the sum is 66.

The spelling of 165155403687672 in words is "one hundred sixty-five trillion, one hundred fifty-five billion, four hundred three million, six hundred eighty-seven thousand, six hundred seventy-two".