163640430346026 has 128 divisors (see below), whose sum is σ = 342322742992896. Its totient is φ = 52111470620160.

The previous prime is 163640430345983. The next prime is 163640430346027. The reversal of 163640430346026 is 620643034046361.

It is not an unprimeable number, because it can be changed into a prime (163640430346027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3755524776 + ... + 3755568348.

It is an arithmetic number, because the mean of its divisors is an integer number (2674396429632).

Almost surely, 2^{163640430346026} is an apocalyptic number.

163640430346026 is an abundant number, since it is smaller than the sum of its proper divisors (178682312646870).

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

163640430346026 is a wasteful number, since it uses less digits than its factorization.

163640430346026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45556.

The product of its (nonzero) digits is 4478976, while the sum is 48.

The spelling of 163640430346026 in words is "one hundred sixty-three trillion, six hundred forty billion, four hundred thirty million, three hundred forty-six thousand, twenty-six".