163613216130640 has 40 divisors (see below), whose sum is σ = 380503622626920. Its totient is φ = 65427584065536.

The previous prime is 163613216130569. The next prime is 163613216130643. The reversal of 163613216130640 is 46031612316361.

It can be written as a sum of positive squares in 4 ways, for example, as 22492406523456 + 141120809607184 = 4742616^2 + 11879428^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×163613216130640² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163613216130643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276302185 + ... + 276893704.

It is an arithmetic number, because the mean of its divisors is an integer number (9512590565673).

Almost surely, 2^{163613216130640} is an apocalyptic number.

163613216130640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163613216130640 is an abundant number, since it is smaller than the sum of its proper divisors (216890406496280).

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

163613216130640 is a wasteful number, since it uses less digits than its factorization.

163613216130640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553199599 (or 553199593 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 163613216130640 in words is "one hundred sixty-three trillion, six hundred thirteen billion, two hundred sixteen million, one hundred thirty thousand, six hundred forty".