43481105128789 has 2 divisors, whose sum is σ = 43481105128790. Its totient is φ = 43481105128788.

The previous prime is 43481105128729. The next prime is 43481105128829. The reversal of 43481105128789 is 98782150118434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35101382828164 + 8379722300625 = 5924642^2 + 2894775^2 .

It is a cyclic number.

It is not a de Polignac number, because 43481105128789 - 2²⁷ = 43480970911061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43481105128729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21740552564394 + 21740552564395.

It is an arithmetic number, because the mean of its divisors is an integer number (21740552564395).

Almost surely, 2^{43481105128789} is an apocalyptic number.

It is an amenable number.

43481105128789 is a deficient number, since it is larger than the sum of its proper divisors (1).

43481105128789 is an equidigital number, since it uses as much as digits as its factorization.

43481105128789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15482880, while the sum is 61.

The spelling of 43481105128789 in words is "forty-three trillion, four hundred eighty-one billion, one hundred five million, one hundred twenty-eight thousand, seven hundred eighty-nine".