2643636823741 has 4 divisors (see below), whose sum is σ = 2758577555232. Its totient is φ = 2528696092252.

The previous prime is 2643636823699. The next prime is 2643636823747. The reversal of 2643636823741 is 1473286363462.

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 not a de Polignac number, because 2643636823741 - 2⁷ = 2643636823613 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 (2643636823747) 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, 57470365711 + ... + 57470365756.

It is an arithmetic number, because the mean of its divisors is an integer number (689644388808).

Almost surely, 2^{2643636823741} is an apocalyptic number.

It is an amenable number.

2643636823741 is a deficient number, since it is larger than the sum of its proper divisors (114940731491).

2643636823741 is a wasteful number, since it uses less digits than its factorization.

2643636823741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114940731490.

The product of its digits is 20901888, while the sum is 55.

The spelling of 2643636823741 in words is "two trillion, six hundred forty-three billion, six hundred thirty-six million, eight hundred twenty-three thousand, seven hundred forty-one".