43745963537 has 2 divisors, whose sum is σ = 43745963538. Its totient is φ = 43745963536.

The previous prime is 43745963497. The next prime is 43745963539. The reversal of 43745963537 is 73536954734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42600547201 + 1145416336 = 206399^2 + 33844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43745963537 is a prime.

Together with 43745963539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43745963539) 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, 21872981768 + 21872981769.

It is an arithmetic number, because the mean of its divisors is an integer number (21872981769).

Almost surely, 2^43745963537 is an apocalyptic number.

It is an amenable number.

43745963537 is a deficient number, since it is larger than the sum of its proper divisors (1).

43745963537 is an equidigital number, since it uses as much as digits as its factorization.

43745963537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28576800, while the sum is 56.

The spelling of 43745963537 in words is "forty-three billion, seven hundred forty-five million, nine hundred sixty-three thousand, five hundred thirty-seven".