2543640226535 has 8 divisors (see below), whose sum is σ = 3060551567040. Its totient is φ = 2029456651104.

The previous prime is 2543640226481. The next prime is 2543640226583. The reversal of 2543640226535 is 5356220463452.

2543640226535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543640226535 is a prime.

It is a super-2 number, since 2×2543640226535² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2543640226535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681939215 + ... + 681942944.

It is an arithmetic number, because the mean of its divisors is an integer number (382568945880).

Almost surely, 2^{2543640226535} is an apocalyptic number.

2543640226535 is a deficient number, since it is larger than the sum of its proper divisors (516911340505).

2543640226535 is a wasteful number, since it uses less digits than its factorization.

2543640226535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363882537.

The product of its (nonzero) digits is 5184000, while the sum is 47.

Adding to 2543640226535 its reverse (5356220463452), we get a palindrome (7899860689987).

The spelling of 2543640226535 in words is "two trillion, five hundred forty-three billion, six hundred forty million, two hundred twenty-six thousand, five hundred thirty-five".