11505450521429 has 2 divisors, whose sum is σ = 11505450521430. Its totient is φ = 11505450521428.

The previous prime is 11505450521407. The next prime is 11505450521441. The reversal of 11505450521429 is 92412505450511.

11505450521429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7650628764529 + 3854821756900 = 2765977^2 + 1963370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11505450521429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11505450521429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11505450521489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752725260714 + 5752725260715.

It is an arithmetic number, because the mean of its divisors is an integer number (5752725260715).

Almost surely, 2^{11505450521429} is an apocalyptic number.

It is an amenable number.

11505450521429 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505450521429 is an equidigital number, since it uses as much as digits as its factorization.

11505450521429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360000, while the sum is 44.

The spelling of 11505450521429 in words is "eleven trillion, five hundred five billion, four hundred fifty million, five hundred twenty-one thousand, four hundred twenty-nine".