165223605125500 has 48 divisors (see below), whose sum is σ = 360872018488800. Its totient is φ = 66085107820800.

The previous prime is 165223605125471. The next prime is 165223605125539. The reversal of 165223605125500 is 5521506322561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3198445 + ... + 18457444.

It is an arithmetic number, because the mean of its divisors is an integer number (7518167051850).

Almost surely, 2^{165223605125500} is an apocalyptic number.

165223605125500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165223605125500 is an abundant number, since it is smaller than the sum of its proper divisors (195648413363300).

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

165223605125500 is a wasteful number, since it uses less digits than its factorization.

165223605125500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21671167 (or 21671155 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 165223605125500 in words is "one hundred sixty-five trillion, two hundred twenty-three billion, six hundred five million, one hundred twenty-five thousand, five hundred".