22164451772 has 6 divisors (see below), whose sum is σ = 38787790608. Its totient is φ = 11082225884.

The previous prime is 22164451753. The next prime is 22164451823. The reversal of 22164451772 is 27715446122.

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 as a sum of consecutive naturals, namely, 2770556468 + ... + 2770556475.

It is an arithmetic number, because the mean of its divisors is an integer number (6464631768).

Almost surely, 2^22164451772 is an apocalyptic number.

It is an amenable number.

22164451772 is a deficient number, since it is larger than the sum of its proper divisors (16623338836).

22164451772 is a wasteful number, since it uses less digits than its factorization.

22164451772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5541112947 (or 5541112945 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

Adding to 22164451772 its reverse (27715446122), we get a palindrome (49879897894).

The spelling of 22164451772 in words is "twenty-two billion, one hundred sixty-four million, four hundred fifty-one thousand, seven hundred seventy-two".