17601473921 has 2 divisors, whose sum is σ = 17601473922. Its totient is φ = 17601473920.

The previous prime is 17601473909. The next prime is 17601473927. The reversal of 17601473921 is 12937410671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10147741696 + 7453732225 = 100736^2 + 86335^2 .

It is an emirp because it is prime and its reverse (12937410671) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17601473921 - 2¹⁴ = 17601457537 is a prime.

It is a super-2 number, since 2×17601473921² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17601473927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8800736960 + 8800736961.

It is an arithmetic number, because the mean of its divisors is an integer number (8800736961).

Almost surely, 2^17601473921 is an apocalyptic number.

It is an amenable number.

17601473921 is a deficient number, since it is larger than the sum of its proper divisors (1).

17601473921 is an equidigital number, since it uses as much as digits as its factorization.

17601473921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 17601473921 in words is "seventeen billion, six hundred one million, four hundred seventy-three thousand, nine hundred twenty-one".