9378444645 has 12 divisors (see below), whose sum is σ = 16255970796. Its totient is φ = 5001837120.

The previous prime is 9378444643. The next prime is 9378444653. The reversal of 9378444645 is 5464448739.

9378444645 is a `hidden beast` number, since 93 + 78 + 4 + 446 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2206556676 + 7171887969 = 46974^2 + 84687^2 .

It is not a de Polignac number, because 9378444645 - 2¹ = 9378444643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9378444591 and 9378444600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9378444641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104204896 + ... + 104204985.

It is an arithmetic number, because the mean of its divisors is an integer number (1354664233).

Almost surely, 2^9378444645 is an apocalyptic number.

It is an amenable number.

9378444645 is a deficient number, since it is larger than the sum of its proper divisors (6877526151).

9378444645 is a wasteful number, since it uses less digits than its factorization.

9378444645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208409892 (or 208409889 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The square root of 9378444645 is about 96842.3700918147. The cubic root of 9378444645 is about 2108.8398828413.

The spelling of 9378444645 in words is "nine billion, three hundred seventy-eight million, four hundred forty-four thousand, six hundred forty-five".