11504525521 has 2 divisors, whose sum is σ = 11504525522. Its totient is φ = 11504525520.

The previous prime is 11504525497. The next prime is 11504525563. The reversal of 11504525521 is 12552540511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11016601600 + 487923921 = 104960^2 + 22089^2 .

It is a cyclic number.

It is not a de Polignac number, because 11504525521 - 2⁷ = 11504525393 is a prime.

It is not a weakly prime, because it can be changed into another prime (11504525621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752262760 + 5752262761.

It is an arithmetic number, because the mean of its divisors is an integer number (5752262761).

Almost surely, 2^11504525521 is an apocalyptic number.

It is an amenable number.

11504525521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11504525521 is an equidigital number, since it uses as much as digits as its factorization.

11504525521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 11504525521 in words is "eleven billion, five hundred four million, five hundred twenty-five thousand, five hundred twenty-one".