3643907409 has 6 divisors (see below), whose sum is σ = 5263421826. Its totient is φ = 2429271600.

The previous prime is 3643907389. The next prime is 3643907413. The reversal of 3643907409 is 9047093463.

3643907409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3569465025 + 74442384 = 59745^2 + 8628^2 .

It is not a de Polignac number, because 3643907409 - 2⁹ = 3643906897 is a prime.

It is a super-2 number, since 2×3643907409² = 26556122410730186562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3643907479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202439292 + ... + 202439309.

It is an arithmetic number, because the mean of its divisors is an integer number (877236971).

Almost surely, 2^3643907409 is an apocalyptic number.

It is an amenable number.

3643907409 is a deficient number, since it is larger than the sum of its proper divisors (1619514417).

3643907409 is a wasteful number, since it uses less digits than its factorization.

3643907409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404878607 (or 404878604 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 3643907409 is about 60364.7861671024. The cubic root of 3643907409 is about 1538.8245667386.

The spelling of 3643907409 in words is "three billion, six hundred forty-three million, nine hundred seven thousand, four hundred nine".