22506161808 has 160 divisors (see below), whose sum is σ = 66705730560. Its totient is φ = 6481175040.

The previous prime is 22506161759. The next prime is 22506161837. The reversal of 22506161808 is 80816160522.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 972613 + ... + 995483.

It is an arithmetic number, because the mean of its divisors is an integer number (416910816).

Almost surely, 2^22506161808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22506161808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33352865280).

22506161808 is an abundant number, since it is smaller than the sum of its proper divisors (44199568752).

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

22506161808 is a wasteful number, since it uses less digits than its factorization.

22506161808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22997 (or 22991 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 22506161808 in words is "twenty-two billion, five hundred six million, one hundred sixty-one thousand, eight hundred eight".