22143977856 has 1024 divisors, whose sum is σ = 90642585600. Its totient is φ = 5135892480.

The previous prime is 22143977833. The next prime is 22143977873. The reversal of 22143977856 is 65877934122.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 127999786 + ... + 127999958.

It is an arithmetic number, because the mean of its divisors is an integer number (88518150).

Almost surely, 2^22143977856 is an apocalyptic number.

22143977856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22143977856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45321292800).

22143977856 is an abundant number, since it is smaller than the sum of its proper divisors (68498607744).

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

22143977856 is a wasteful number, since it uses less digits than its factorization.

22143977856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 246 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

It can be divided in two parts, 22143 and 977856, that added together give a palindrome (999999).

The spelling of 22143977856 in words is "twenty-two billion, one hundred forty-three million, nine hundred seventy-seven thousand, eight hundred fifty-six".