165858487444 has 96 divisors (see below), whose sum is σ = 332255468160. Its totient is φ = 71812915200.

The previous prime is 165858487441. The next prime is 165858487477. The reversal of 165858487444 is 444784858561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165858487441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76749724 + ... + 76751884.

It is an arithmetic number, because the mean of its divisors is an integer number (3460994460).

Almost surely, 2^165858487444 is an apocalyptic number.

It is an amenable number.

165858487444 is an abundant number, since it is smaller than the sum of its proper divisors (166396980716).

165858487444 is a wasteful number, since it uses less digits than its factorization.

165858487444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921 (or 2919 counting only the distinct ones).

The product of its digits is 137625600, while the sum is 64.

The spelling of 165858487444 in words is "one hundred sixty-five billion, eight hundred fifty-eight million, four hundred eighty-seven thousand, four hundred forty-four".