3640243631 has 8 divisors (see below), whose sum is σ = 3783675504. Its totient is φ = 3499182720.

The previous prime is 3640243619. The next prime is 3640243637. The reversal of 3640243631 is 1363420463.

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 3640243631 - 2¹⁰ = 3640242607 is a prime.

It is a super-2 number, since 2×3640243631² = 26502747386072128322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640243637) 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, 589610 + ... + 595751.

It is an arithmetic number, because the mean of its divisors is an integer number (472959438).

Almost surely, 2^3640243631 is an apocalyptic number.

3640243631 is a deficient number, since it is larger than the sum of its proper divisors (143431873).

3640243631 is a wasteful number, since it uses less digits than its factorization.

3640243631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185481.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 3640243631 is about 60334.4315544615. The cubic root of 3640243631 is about 1538.3086551480.

The spelling of 3640243631 in words is "three billion, six hundred forty million, two hundred forty-three thousand, six hundred thirty-one".