3640440520543 has 32 divisors (see below), whose sum is σ = 3766444194240. Its totient is φ = 3516031411200.

The previous prime is 3640440520517. The next prime is 3640440520573. The reversal of 3640440520543 is 3450250440463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640440520543 is a prime.

It is a super-2 number, since 2×3640440520543² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3640440520496 and 3640440520505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640440520573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4966494205 + ... + 4966494937.

It is an arithmetic number, because the mean of its divisors is an integer number (117701381070).

Almost surely, 2^{3640440520543} is an apocalyptic number.

3640440520543 is a deficient number, since it is larger than the sum of its proper divisors (126003673697).

3640440520543 is a wasteful number, since it uses less digits than its factorization.

3640440520543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347.

The product of its (nonzero) digits is 691200, while the sum is 40.

The spelling of 3640440520543 in words is "three trillion, six hundred forty billion, four hundred forty million, five hundred twenty thousand, five hundred forty-three".