165020050206990 has 128 divisors (see below), whose sum is σ = 480132455523840. Its totient is φ = 39998683353600.

The previous prime is 165020050206941. The next prime is 165020050207013. The reversal of 165020050206990 is 99602050020561.

It is a happy number.

165020050206990 is a `hidden beast` number, since 1 + 6 + 50 + 2 + 0 + 0 + 502 + 0 + 6 + 9 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14962017 + ... + 23535123.

It is an arithmetic number, because the mean of its divisors is an integer number (3751034808780).

Almost surely, 2^{165020050206990} is an apocalyptic number.

165020050206990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165020050206990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240066227761920).

165020050206990 is an abundant number, since it is smaller than the sum of its proper divisors (315112405316850).

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

165020050206990 is a wasteful number, since it uses less digits than its factorization.

165020050206990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8579615 (or 8579609 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 165020050206990 in words is "one hundred sixty-five trillion, twenty billion, fifty million, two hundred six thousand, nine hundred ninety".