643027612651 has 2 divisors, whose sum is σ = 643027612652. Its totient is φ = 643027612650.

The previous prime is 643027612597. The next prime is 643027612657. The reversal of 643027612651 is 156216720346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643027612651 - 2²⁵ = 642994058219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643027612598 and 643027612607.

It is not a weakly prime, because it can be changed into another prime (643027612657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321513806325 + 321513806326.

It is an arithmetic number, because the mean of its divisors is an integer number (321513806326).

Almost surely, 2^643027612651 is an apocalyptic number.

643027612651 is a deficient number, since it is larger than the sum of its proper divisors (1).

643027612651 is an equidigital number, since it uses as much as digits as its factorization.

643027612651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 643027612651 in words is "six hundred forty-three billion, twenty-seven million, six hundred twelve thousand, six hundred fifty-one".