11504525621 has 2 divisors, whose sum is σ = 11504525622. Its totient is φ = 11504525620.

The previous prime is 11504525611. The next prime is 11504525741. The reversal of 11504525621 is 12652540511.

11504525621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7869641521 + 3634884100 = 88711^2 + 60290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11504525621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11504525611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752262810 + 5752262811.

It is an arithmetic number, because the mean of its divisors is an integer number (5752262811).

Almost surely, 2^11504525621 is an apocalyptic number.

It is an amenable number.

11504525621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11504525621 is an equidigital number, since it uses as much as digits as its factorization.

11504525621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 11504525621 in words is "eleven billion, five hundred four million, five hundred twenty-five thousand, six hundred twenty-one".