2640464120449 has 16 divisors (see below), whose sum is σ = 2655530494848. Its totient is φ = 2625439444992.

The previous prime is 2640464120387. The next prime is 2640464120471. The reversal of 2640464120449 is 9440214640462.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640464120449 is a prime.

It is a super-2 number, since 2×2640464120449² (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 = 2640464120399 and 2640464120408.

It is not an unprimeable number, because it can be changed into a prime (2640464120479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430530787 + ... + 430536919.

It is an arithmetic number, because the mean of its divisors is an integer number (165970655928).

Almost surely, 2^{2640464120449} is an apocalyptic number.

It is an amenable number.

2640464120449 is a deficient number, since it is larger than the sum of its proper divisors (15066374399).

2640464120449 is a wasteful number, since it uses less digits than its factorization.

2640464120449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9144.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 2640464120449 in words is "two trillion, six hundred forty billion, four hundred sixty-four million, one hundred twenty thousand, four hundred forty-nine".