4354644645 has 80 divisors (see below), whose sum is σ = 8612038512. Its totient is φ = 2091432960.

The previous prime is 4354644631. The next prime is 4354644661. The reversal of 4354644645 is 5464464534.

4354644645 is a `hidden beast` number, since 4 + 3 + 546 + 44 + 64 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 134583201 + 4220061444 = 11601^2 + 64962^2 .

It is not a de Polignac number, because 4354644645 - 2⁴ = 4354644629 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 4354644645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 205779 + ... + 225951.

Almost surely, 2^4354644645 is an apocalyptic number.

4354644645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4354644645 is a deficient number, since it is larger than the sum of its proper divisors (4257393867).

4354644645 is a wasteful number, since it uses less digits than its factorization.

4354644645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20244 (or 20235 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 45.

The square root of 4354644645 is about 65989.7313602654. The cubic root of 4354644645 is about 1632.9926885285.

The spelling of 4354644645 in words is "four billion, three hundred fifty-four million, six hundred forty-four thousand, six hundred forty-five".