3644994463 has 32 divisors (see below), whose sum is σ = 4301294400. Its totient is φ = 3051970560.

The previous prime is 3644994461. The next prime is 3644994467.

3644994463 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 3644994463 - 2¹ = 3644994461 is a prime.

It is a Duffinian number.

Its product of digits (6718464) is a multiple of the sum of its prime divisors (2187).

It is a self number, because there is not a number n which added to its sum of digits gives 3644994463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644994461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1869213 + ... + 1871161.

It is an arithmetic number, because the mean of its divisors is an integer number (134415450).

Almost surely, 2^3644994463 is an apocalyptic number.

3644994463 is a deficient number, since it is larger than the sum of its proper divisors (656299937).

3644994463 is a wasteful number, since it uses less digits than its factorization.

3644994463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187.

The product of its digits is 6718464, while the sum is 52.

The square root of 3644994463 is about 60373.7895365199. The cubic root of 3644994463 is about 1538.9775727381.

The spelling of 3644994463 in words is "three billion, six hundred forty-four million, nine hundred ninety-four thousand, four hundred sixty-three".