3640038865331 has 4 divisors (see below), whose sum is σ = 3970951489464. Its totient is φ = 3309126241200.

The previous prime is 3640038865319. The next prime is 3640038865409. The reversal of 3640038865331 is 1335688300463.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640038865331 is a prime.

It is a super-2 number, since 2×3640038865331² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3640038865331.

It is not an unprimeable number, because it can be changed into a prime (3640038865531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165456312050 + ... + 165456312071.

It is an arithmetic number, because the mean of its divisors is an integer number (992737872366).

Almost surely, 2^{3640038865331} is an apocalyptic number.

3640038865331 is a deficient number, since it is larger than the sum of its proper divisors (330912624133).

3640038865331 is a wasteful number, since it uses less digits than its factorization.

3640038865331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330912624132.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 3640038865331 in words is "three trillion, six hundred forty billion, thirty-eight million, eight hundred sixty-five thousand, three hundred thirty-one".