3644398705 has 4 divisors (see below), whose sum is σ = 4373278452. Its totient is φ = 2915518960.

The previous prime is 3644398697. The next prime is 3644398711. The reversal of 3644398705 is 5078934463.

3644398705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2512816384 + 1131582321 = 50128^2 + 33639^2 .

It is not a de Polignac number, because 3644398705 - 2³ = 3644398697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364439866 + ... + 364439875.

It is an arithmetic number, because the mean of its divisors is an integer number (1093319613).

Almost surely, 2^3644398705 is an apocalyptic number.

It is an amenable number.

3644398705 is a deficient number, since it is larger than the sum of its proper divisors (728879747).

3644398705 is an equidigital number, since it uses as much as digits as its factorization.

3644398705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728879746.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The square root of 3644398705 is about 60368.8554223119. The cubic root of 3644398705 is about 1538.8937218419.

The spelling of 3644398705 in words is "three billion, six hundred forty-four million, three hundred ninety-eight thousand, seven hundred five".