165189630728640 has 224 divisors, whose sum is σ = 618737935601664. Its totient is φ = 36539641774080.

The previous prime is 165189630728627. The next prime is 165189630728723. The reversal of 165189630728640 is 46827036981561.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×165189630728640² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396272169 + ... + 396688808.

It is a 2-persistent number, because it is pandigital, and so is 2⋅165189630728640 = 330379261457280, but 3⋅165189630728640 = 495568892185920 is not.

Almost surely, 2^{165189630728640} is an apocalyptic number.

165189630728640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165189630728640 is an abundant number, since it is smaller than the sum of its proper divisors (453548304873024).

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

165189630728640 is a wasteful number, since it uses less digits than its factorization.

165189630728640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792961035 (or 792961025 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 66.

The spelling of 165189630728640 in words is "one hundred sixty-five trillion, one hundred eighty-nine billion, six hundred thirty million, seven hundred twenty-eight thousand, six hundred forty".