7944522165 has 24 divisors (see below), whose sum is σ = 13831185888. Its totient is φ = 4218407520.

The previous prime is 7944522143. The next prime is 7944522167. The reversal of 7944522165 is 5612254497.

7944522165 is a `hidden beast` number, since 79 + 44 + 522 + 16 + 5 = 666.

It is not a de Polignac number, because 7944522165 - 2⁶ = 7944522101 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 7944522165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944522167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378651 + ... + 399080.

It is an arithmetic number, because the mean of its divisors is an integer number (576299412).

Almost surely, 2^7944522165 is an apocalyptic number.

It is an amenable number.

7944522165 is a deficient number, since it is larger than the sum of its proper divisors (5886663723).

7944522165 is a wasteful number, since it uses less digits than its factorization.

7944522165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777969 (or 777966 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 7944522165 is about 89132.0490340035. The cubic root of 7944522165 is about 1995.3661189484.

The spelling of 7944522165 in words is "seven billion, nine hundred forty-four million, five hundred twenty-two thousand, one hundred sixty-five".