17660863968 has 96 divisors (see below), whose sum is σ = 50654419200. Its totient is φ = 5343298560.

The previous prime is 17660863963. The next prime is 17660864003. The reversal of 17660863968 is 86936806671.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×17660863968² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17660863963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670308 + ... + 696156.

It is an arithmetic number, because the mean of its divisors is an integer number (527650200).

Almost surely, 2^17660863968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17660863968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25327209600).

17660863968 is an abundant number, since it is smaller than the sum of its proper divisors (32993555232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17660863968 is a wasteful number, since it uses less digits than its factorization.

17660863968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26520 (or 26512 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 17660863968 in words is "seventeen billion, six hundred sixty million, eight hundred sixty-three thousand, nine hundred sixty-eight".