163644265116390 has 32 divisors (see below), whose sum is σ = 392847905270016. Its totient is φ = 43627174143200.

The previous prime is 163644265116379. The next prime is 163644265116391. The reversal of 163644265116390 is 93611562446361.

163644265116390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 163644265116390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163644265116391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705916836 + ... + 706148615.

It is an arithmetic number, because the mean of its divisors is an integer number (12276497039688).

Almost surely, 2^{163644265116390} is an apocalyptic number.

163644265116390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163644265116390 is an abundant number, since it is smaller than the sum of its proper divisors (229203640153626).

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

163644265116390 is a wasteful number, since it uses less digits than its factorization.

163644265116390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412069324.

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 163644265116390 in words is "one hundred sixty-three trillion, six hundred forty-four billion, two hundred sixty-five million, one hundred sixteen thousand, three hundred ninety".