3640440463 has 4 divisors (see below), whose sum is σ = 3971389608. Its totient is φ = 3309491320.

The previous prime is 3640440403. The next prime is 3640440487.

3640440463 is nontrivially palindromic in base 10.

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 3640440463 - 2¹⁷ = 3640309391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640440403) 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, 165474556 + ... + 165474577.

It is an arithmetic number, because the mean of its divisors is an integer number (992847402).

Almost surely, 2^3640440463 is an apocalyptic number.

3640440463 is a deficient number, since it is larger than the sum of its proper divisors (330949145).

3640440463 is a wasteful number, since it uses less digits than its factorization.

3640440463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330949144.

The product of its (nonzero) digits is 82944, while the sum is 34.

The square root of 3640440463 is about 60336.0627071406. The cubic root of 3640440463 is about 1538.3363806652.

It can be divided in two parts, 36404 and 40463, that added together give a palindrome (76867).

The spelling of 3640440463 in words is "three billion, six hundred forty million, four hundred forty thousand, four hundred sixty-three".