165624738 has 16 divisors (see below), whose sum is σ = 331389120. Its totient is φ = 55184976.

The previous prime is 165624733. The next prime is 165624743. The reversal of 165624738 is 837426561.

It is an interprime number because it is at equal distance from previous prime (165624733) and next prime (165624743).

It is a self number, because there is not a number n which added to its sum of digits gives 165624738.

It is not an unprimeable number, because it can be changed into a prime (165624731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15756 + ... + 24072.

It is an arithmetic number, because the mean of its divisors is an integer number (20711820).

Almost surely, 2^165624738 is an apocalyptic number.

165624738 is an abundant number, since it is smaller than the sum of its proper divisors (165764382).

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

165624738 is a wasteful number, since it uses less digits than its factorization.

165624738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11641.

The product of its digits is 241920, while the sum is 42.

The square root of 165624738 is about 12869.5274971539. The cubic root of 165624738 is about 549.1720191806.

The spelling of 165624738 in words is "one hundred sixty-five million, six hundred twenty-four thousand, seven hundred thirty-eight".