1944537165 has 32 divisors (see below), whose sum is σ = 3480192000. Its totient is φ = 1030115520.

The previous prime is 1944537151. The next prime is 1944537167. The reversal of 1944537165 is 5617354491.

1944537165 is a `hidden beast` number, since 19 + 44 + 537 + 1 + 65 = 666.

It is not a de Polignac number, because 1944537165 - 2¹⁰ = 1944536141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1944537165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944537167) 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 31 ways as a sum of consecutive naturals, for example, 28221 + ... + 68450.

It is an arithmetic number, because the mean of its divisors is an integer number (108756000).

Almost surely, 2^1944537165 is an apocalyptic number.

1944537165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1944537165 is a deficient number, since it is larger than the sum of its proper divisors (1535654835).

1944537165 is a wasteful number, since it uses less digits than its factorization.

1944537165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96834 (or 96828 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 1944537165 is about 44096.9065241543. The cubic root of 1944537165 is about 1248.1652367661.

The spelling of 1944537165 in words is "one billion, nine hundred forty-four million, five hundred thirty-seven thousand, one hundred sixty-five".