3640539043 has 4 divisors (see below), whose sum is σ = 3641336608. Its totient is φ = 3639741480.

The previous prime is 3640539031. The next prime is 3640539047. The reversal of 3640539043 is 3409350463.

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

It is a cyclic number.

It is not a de Polignac number, because 3640539043 - 2²⁵ = 3606984611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3640538993 and 3640539011.

It is not an unprimeable number, because it can be changed into a prime (3640539047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391896 + ... + 401077.

It is an arithmetic number, because the mean of its divisors is an integer number (910334152).

Almost surely, 2^3640539043 is an apocalyptic number.

3640539043 is a deficient number, since it is larger than the sum of its proper divisors (797565).

3640539043 is an equidigital number, since it uses as much as digits as its factorization.

3640539043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797564.

The product of its (nonzero) digits is 116640, while the sum is 37.

The square root of 3640539043 is about 60336.8796259800. The cubic root of 3640539043 is about 1538.3502661491.

The spelling of 3640539043 in words is "three billion, six hundred forty million, five hundred thirty-nine thousand, forty-three".