165821648142 has 32 divisors (see below), whose sum is σ = 343913536512. Its totient is φ = 53257850784.

The previous prime is 165821648137. The next prime is 165821648159. The reversal of 165821648142 is 241846128561.

It is a junction number, because it is equal to n+sod(n) for n = 165821648091 and 165821648100.

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, 3603078 + ... + 3648809.

It is an arithmetic number, because the mean of its divisors is an integer number (10747298016).

Almost surely, 2^165821648142 is an apocalyptic number.

165821648142 is an abundant number, since it is smaller than the sum of its proper divisors (178091888370).

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

165821648142 is a wasteful number, since it uses less digits than its factorization.

165821648142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252032.

The product of its digits is 737280, while the sum is 48.

The spelling of 165821648142 in words is "one hundred sixty-five billion, eight hundred twenty-one million, six hundred forty-eight thousand, one hundred forty-two".