163516378064 has 20 divisors (see below), whose sum is σ = 341183212356. Its totient is φ = 75469097472.

The previous prime is 163516378061. The next prime is 163516378117. The reversal of 163516378064 is 460873615361.

It can be written as a sum of positive squares in 2 ways, for example, as 9004491664 + 154511886400 = 94892^2 + 393080^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163516378061) 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, 393068009 + ... + 393068424.

Almost surely, 2^163516378064 is an apocalyptic number.

It is an amenable number.

163516378064 is an abundant number, since it is smaller than the sum of its proper divisors (177666834292).

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

163516378064 is a wasteful number, since it uses less digits than its factorization.

163516378064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786136454 (or 786136448 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 163516378064 in words is "one hundred sixty-three billion, five hundred sixteen million, three hundred seventy-eight thousand, sixty-four".