2643615897439 has 16 divisors (see below), whose sum is σ = 2899417098240. Its totient is φ = 2390396688000.

The previous prime is 2643615897341. The next prime is 2643615897457. The reversal of 2643615897439 is 9347985163462.

It is a cyclic number.

It is not a de Polignac number, because 2643615897439 - 2⁹ = 2643615896927 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 (2643615897479) 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, 17107159 + ... + 17260999.

It is an arithmetic number, because the mean of its divisors is an integer number (181213568640).

Almost surely, 2^{2643615897439} is an apocalyptic number.

2643615897439 is a deficient number, since it is larger than the sum of its proper divisors (255801200801).

2643615897439 is a wasteful number, since it uses less digits than its factorization.

2643615897439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162222.

The product of its digits is 235146240, while the sum is 67.

The spelling of 2643615897439 in words is "two trillion, six hundred forty-three billion, six hundred fifteen million, eight hundred ninety-seven thousand, four hundred thirty-nine".