163621220440662 has 128 divisors (see below), whose sum is σ = 383451338880000. Its totient is φ = 51640583774976.

The previous prime is 163621220440619. The next prime is 163621220440681. The reversal of 163621220440662 is 266044022126361.

It is a happy number.

163621220440662 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 212 + 20 + 4 + 406 + 6 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35624223 + ... + 39954069.

It is an arithmetic number, because the mean of its divisors is an integer number (2995713585000).

Almost surely, 2^{163621220440662} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163621220440662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191725669440000).

163621220440662 is an abundant number, since it is smaller than the sum of its proper divisors (219830118439338).

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

163621220440662 is a wasteful number, since it uses less digits than its factorization.

163621220440662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330355 (or 4330349 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 163621220440662 in words is "one hundred sixty-three trillion, six hundred twenty-one billion, two hundred twenty million, four hundred forty thousand, six hundred sixty-two".