165215974044 has 48 divisors (see below), whose sum is σ = 420998893056. Its totient is φ = 50011977600.

The previous prime is 165215974009. The next prime is 165215974057. The reversal of 165215974044 is 440479512561.

It is a super-3 number, since 3×165215974044³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165215973984 and 165215974002.

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, 544212 + ... + 791579.

It is an arithmetic number, because the mean of its divisors is an integer number (8770810272).

Almost surely, 2^165215974044 is an apocalyptic number.

It is an amenable number.

165215974044 is an abundant number, since it is smaller than the sum of its proper divisors (255782919012).

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

165215974044 is a wasteful number, since it uses less digits than its factorization.

165215974044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336746 (or 1336744 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 165215974044 in words is "one hundred sixty-five billion, two hundred fifteen million, nine hundred seventy-four thousand, forty-four".