72643206145943 has 2 divisors, whose sum is σ = 72643206145944. Its totient is φ = 72643206145942.

The previous prime is 72643206145897. The next prime is 72643206146011. The reversal of 72643206145943 is 34954160234627.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72643206145943 - 2⁴⁰ = 71543694518167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72643206145043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36321603072971 + 36321603072972.

It is an arithmetic number, because the mean of its divisors is an integer number (36321603072972).

Almost surely, 2^{72643206145943} is an apocalyptic number.

72643206145943 is a deficient number, since it is larger than the sum of its proper divisors (1).

72643206145943 is an equidigital number, since it uses as much as digits as its factorization.

72643206145943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 56.

The spelling of 72643206145943 in words is "seventy-two trillion, six hundred forty-three billion, two hundred six million, one hundred forty-five thousand, nine hundred forty-three".