165373905870 has 48 divisors (see below), whose sum is σ = 433065512880. Its totient is φ = 43782440832.

The previous prime is 165373905799. The next prime is 165373905913. The reversal of 165373905870 is 78509373561.

165373905870 is a `hidden beast` number, since 1 + 6 + 53 + 7 + 3 + 9 + 0 + 587 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6597159 + ... + 6622178.

It is an arithmetic number, because the mean of its divisors is an integer number (9022198185).

Almost surely, 2^165373905870 is an apocalyptic number.

165373905870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165373905870 is an abundant number, since it is smaller than the sum of its proper divisors (267691607010).

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

165373905870 is a wasteful number, since it uses less digits than its factorization.

165373905870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13219489 (or 13219486 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 165373905870 in words is "one hundred sixty-five billion, three hundred seventy-three million, nine hundred five thousand, eight hundred seventy".