43011665551 has 2 divisors, whose sum is σ = 43011665552. Its totient is φ = 43011665550.

The previous prime is 43011665503. The next prime is 43011665561. The reversal of 43011665551 is 15556611034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43011665551 - 2¹¹ = 43011663503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43011665551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43011665561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21505832775 + 21505832776.

It is an arithmetic number, because the mean of its divisors is an integer number (21505832776).

Almost surely, 2^43011665551 is an apocalyptic number.

43011665551 is a deficient number, since it is larger than the sum of its proper divisors (1).

43011665551 is an equidigital number, since it uses as much as digits as its factorization.

43011665551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 43011665551 in words is "forty-three billion, eleven million, six hundred sixty-five thousand, five hundred fifty-one".