2643731655853 has 4 divisors (see below), whose sum is σ = 2699981265600. Its totient is φ = 2587482046108.

The previous prime is 2643731655847. The next prime is 2643731655883. The reversal of 2643731655853 is 3585561373462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643731655853 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 (2643731655883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28124804803 + ... + 28124804896.

It is an arithmetic number, because the mean of its divisors is an integer number (674995316400).

Almost surely, 2^{2643731655853} is an apocalyptic number.

It is an amenable number.

2643731655853 is a deficient number, since it is larger than the sum of its proper divisors (56249609747).

2643731655853 is an equidigital number, since it uses as much as digits as its factorization.

2643731655853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56249609746.

The product of its digits is 54432000, while the sum is 58.

The spelling of 2643731655853 in words is "two trillion, six hundred forty-three billion, seven hundred thirty-one million, six hundred fifty-five thousand, eight hundred fifty-three".