163806377706 has 128 divisors (see below), whose sum is σ = 384134400000. Its totient is φ = 51640098048.

The previous prime is 163806377677. The next prime is 163806377717. The reversal of 163806377706 is 607773608361.

It is a happy number.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 70031485 + ... + 70033823.

It is an arithmetic number, because the mean of its divisors is an integer number (3001050000).

Almost surely, 2^163806377706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163806377706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192067200000).

163806377706 is an abundant number, since it is smaller than the sum of its proper divisors (220328022294).

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

163806377706 is a wasteful number, since it uses less digits than its factorization.

163806377706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 54.

The spelling of 163806377706 in words is "one hundred sixty-three billion, eight hundred six million, three hundred seventy-seven thousand, seven hundred six".