17475921521 has 2 divisors, whose sum is σ = 17475921522. Its totient is φ = 17475921520.

The previous prime is 17475921509. The next prime is 17475921553. The reversal of 17475921521 is 12512957471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12340765921 + 5135155600 = 111089^2 + 71660^2 .

It is a cyclic number.

It is not a de Polignac number, because 17475921521 - 2⁶ = 17475921457 is a prime.

It is not a weakly prime, because it can be changed into another prime (17475521521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8737960760 + 8737960761.

It is an arithmetic number, because the mean of its divisors is an integer number (8737960761).

Almost surely, 2^17475921521 is an apocalyptic number.

It is an amenable number.

17475921521 is a deficient number, since it is larger than the sum of its proper divisors (1).

17475921521 is an equidigital number, since it uses as much as digits as its factorization.

17475921521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 44.

The spelling of 17475921521 in words is "seventeen billion, four hundred seventy-five million, nine hundred twenty-one thousand, five hundred twenty-one".