163636426513216 has 28 divisors (see below), whose sum is σ = 324739994561892. Its totient is φ = 81812175915008.

The previous prime is 163636426513207. The next prime is 163636426513279. The reversal of 163636426513216 is 612315624636361.

It can be written as a sum of positive squares in 2 ways, for example, as 115654538318400 + 47981888194816 = 10754280^2 + 6926896^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93459295 + ... + 95194078.

It is an arithmetic number, because the mean of its divisors is an integer number (11597856948639).

Almost surely, 2^{163636426513216} is an apocalyptic number.

163636426513216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

163636426513216 is a deficient number, since it is larger than the sum of its proper divisors (161103568048676).

163636426513216 is a wasteful number, since it uses less digits than its factorization.

163636426513216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188666938 (or 188666928 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 55.

The spelling of 163636426513216 in words is "one hundred sixty-three trillion, six hundred thirty-six billion, four hundred twenty-six million, five hundred thirteen thousand, two hundred sixteen".