43521743953 has 2 divisors, whose sum is σ = 43521743954. Its totient is φ = 43521743952.

The previous prime is 43521743927. The next prime is 43521743959. The reversal of 43521743953 is 35934712534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43443898624 + 77845329 = 208432^2 + 8823^2 .

It is a cyclic number.

It is not a de Polignac number, because 43521743953 - 2⁵ = 43521743921 is a prime.

It is not a weakly prime, because it can be changed into another prime (43521743959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760871976 + 21760871977.

It is an arithmetic number, because the mean of its divisors is an integer number (21760871977).

Almost surely, 2^43521743953 is an apocalyptic number.

It is an amenable number.

43521743953 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521743953 is an equidigital number, since it uses as much as digits as its factorization.

43521743953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 46.

The spelling of 43521743953 in words is "forty-three billion, five hundred twenty-one million, seven hundred forty-three thousand, nine hundred fifty-three".