165623944 has 8 divisors (see below), whose sum is σ = 310544910. Its totient is φ = 82811968.

The previous prime is 165623881. The next prime is 165623957. The reversal of 165623944 is 449326561.

165623944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159719044 + 5904900 = 12638^2 + 2430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×165623944² = 54862581652230272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165623897 and 165623906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351489 + ... + 10351504.

Almost surely, 2^165623944 is an apocalyptic number.

It is an amenable number.

165623944 is a deficient number, since it is larger than the sum of its proper divisors (144920966).

165623944 is a wasteful number, since it uses less digits than its factorization.

165623944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20702999 (or 20702995 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 165623944 is about 12869.4966490535. The cubic root of 165623944 is about 549.1711416079.

It can be divided in two parts, 1656 and 23944, that added together give a square (25600 = 160²).

The spelling of 165623944 in words is "one hundred sixty-five million, six hundred twenty-three thousand, nine hundred forty-four".