168732064464 has 20 divisors (see below), whose sum is σ = 435891166656. Its totient is φ = 56244021472.

The previous prime is 168732064463. The next prime is 168732064481. The reversal of 168732064464 is 464460237861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168732064463) 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, 1757625624 + ... + 1757625719.

Almost surely, 2^168732064464 is an apocalyptic number.

It is an amenable number.

168732064464 is an abundant number, since it is smaller than the sum of its proper divisors (267159102192).

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

168732064464 is a wasteful number, since it uses less digits than its factorization.

168732064464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515251354 (or 3515251348 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 168732064464 in words is "one hundred sixty-eight billion, seven hundred thirty-two million, sixty-four thousand, four hundred sixty-four".