16601507217 has 6 divisors (see below), whose sum is σ = 23979954882. Its totient is φ = 11067671472.

The previous prime is 16601507207. The next prime is 16601507227. The reversal of 16601507217 is 71270510661.

It is an interprime number because it is at equal distance from previous prime (16601507207) and next prime (16601507227).

It can be written as a sum of positive squares in only one way, i.e., 15976707201 + 624800016 = 126399^2 + 24996^2 .

It is not a de Polignac number, because 16601507217 - 2¹¹ = 16601505169 is a prime.

It is a super-2 number, since 2×16601507217² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16601507207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 922305948 + ... + 922305965.

It is an arithmetic number, because the mean of its divisors is an integer number (3996659147).

Almost surely, 2^16601507217 is an apocalyptic number.

It is an amenable number.

16601507217 is a deficient number, since it is larger than the sum of its proper divisors (7378447665).

16601507217 is a wasteful number, since it uses less digits than its factorization.

16601507217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844611919 (or 1844611916 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The spelling of 16601507217 in words is "sixteen billion, six hundred one million, five hundred seven thousand, two hundred seventeen".