43644631456423 has 16 divisors (see below), whose sum is σ = 43749828777600. Its totient is φ = 43539578818560.

The previous prime is 43644631456379. The next prime is 43644631456463. The reversal of 43644631456423 is 32465413644634.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43644631456423 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 (43644631456463) 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, 5726886553 + ... + 5726894173.

It is an arithmetic number, because the mean of its divisors is an integer number (2734364298600).

Almost surely, 2^{43644631456423} is an apocalyptic number.

43644631456423 is a deficient number, since it is larger than the sum of its proper divisors (105197321177).

43644631456423 is a wasteful number, since it uses less digits than its factorization.

43644631456423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15402.

The product of its digits is 59719680, while the sum is 55.

The spelling of 43644631456423 in words is "forty-three trillion, six hundred forty-four billion, six hundred thirty-one million, four hundred fifty-six thousand, four hundred twenty-three".