165115672021630 has 64 divisors (see below), whose sum is σ = 338327843728896. Its totient is φ = 57430880496000.

The previous prime is 165115672021621. The next prime is 165115672021631. The reversal of 165115672021630 is 36120276511561.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165115672021631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255158785 + ... + 255805075.

It is an arithmetic number, because the mean of its divisors is an integer number (5286372558264).

Almost surely, 2^{165115672021630} is an apocalyptic number.

165115672021630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165115672021630 is an abundant number, since it is smaller than the sum of its proper divisors (173212171707266).

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

165115672021630 is a wasteful number, since it uses less digits than its factorization.

165115672021630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747313.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 165115672021630 in words is "one hundred sixty-five trillion, one hundred fifteen billion, six hundred seventy-two million, twenty-one thousand, six hundred thirty".