3639640913 has 8 divisors (see below), whose sum is σ = 3683228640. Its totient is φ = 3596302080.

The previous prime is 3639640903. The next prime is 3639640973. The reversal of 3639640913 is 3190469363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3639640913 - 2¹⁴ = 3639624529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3639640903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32720 + ... + 91377.

It is an arithmetic number, because the mean of its divisors is an integer number (460403580).

Almost surely, 2^3639640913 is an apocalyptic number.

It is an amenable number.

3639640913 is a deficient number, since it is larger than the sum of its proper divisors (43587727).

3639640913 is a wasteful number, since it uses less digits than its factorization.

3639640913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124447.

The product of its (nonzero) digits is 314928, while the sum is 44.

The square root of 3639640913 is about 60329.4365380616. The cubic root of 3639640913 is about 1538.2237508042.

The spelling of 3639640913 in words is "three billion, six hundred thirty-nine million, six hundred forty thousand, nine hundred thirteen".