11470517521 has 4 divisors (see below), whose sum is σ = 11627647972. Its totient is φ = 11313387072.

The previous prime is 11470517477. The next prime is 11470517549. The reversal of 11470517521 is 12571507411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2160390400 + 9310127121 = 46480^2 + 96489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11470517521 - 2¹¹ = 11470515473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11470517921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78565116 + ... + 78565261.

It is an arithmetic number, because the mean of its divisors is an integer number (2906911993).

Almost surely, 2^11470517521 is an apocalyptic number.

It is an amenable number.

11470517521 is a deficient number, since it is larger than the sum of its proper divisors (157130451).

11470517521 is an equidigital number, since it uses as much as digits as its factorization.

11470517521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157130450.

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 11470517521 in words is "eleven billion, four hundred seventy million, five hundred seventeen thousand, five hundred twenty-one".