643624026654097 has 4 divisors (see below), whose sum is σ = 643624085812720. Its totient is φ = 643623967495476.

The previous prime is 643624026654043. The next prime is 643624026654181. The reversal of 643624026654097 is 790456620426346.

643624026654097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 643624026654097 - 2⁷ = 643624026653969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643624026354097) 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, 8023743 + ... + 36764500.

It is an arithmetic number, because the mean of its divisors is an integer number (160906021453180).

Almost surely, 2^{643624026654097} is an apocalyptic number.

It is an amenable number.

643624026654097 is a deficient number, since it is larger than the sum of its proper divisors (59158623).

643624026654097 is a wasteful number, since it uses less digits than its factorization.

643624026654097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59158622.

The product of its (nonzero) digits is 313528320, while the sum is 64.

The spelling of 643624026654097 in words is "six hundred forty-three trillion, six hundred twenty-four billion, twenty-six million, six hundred fifty-four thousand, ninety-seven".