22505660604 has 108 divisors (see below), whose sum is σ = 66514311864. Its totient is φ = 6397449408.

The previous prime is 22505660587. The next prime is 22505660629. The reversal of 22505660604 is 40606650522.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 315127 + ... + 379889.

It is an arithmetic number, because the mean of its divisors is an integer number (615873258).

Almost surely, 2^22505660604 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 22505660604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33257155932).

22505660604 is an abundant number, since it is smaller than the sum of its proper divisors (44008651260).

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

22505660604 is a wasteful number, since it uses less digits than its factorization.

22505660604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64984 (or 64972 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 22505660604 in words is "twenty-two billion, five hundred five million, six hundred sixty thousand, six hundred four".