40656332543 has 2 divisors, whose sum is σ = 40656332544. Its totient is φ = 40656332542.

The previous prime is 40656332537. The next prime is 40656332557. The reversal of 40656332543 is 34523365604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40656332543 - 2⁴ = 40656332527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40656332543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40656332443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20328166271 + 20328166272.

It is an arithmetic number, because the mean of its divisors is an integer number (20328166272).

Almost surely, 2^40656332543 is an apocalyptic number.

40656332543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40656332543 is an equidigital number, since it uses as much as digits as its factorization.

40656332543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 41.

The spelling of 40656332543 in words is "forty billion, six hundred fifty-six million, three hundred thirty-two thousand, five hundred forty-three".