22621455144 has 192 divisors, whose sum is σ = 70200224640. Its totient is φ = 6788136960.

The previous prime is 22621455137. The next prime is 22621455151. The reversal of 22621455144 is 44155412622.

22621455144 is a `hidden beast` number, since 2 + 2 + 62 + 1 + 4 + 551 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (22621455137) and next prime (22621455151).

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

It is a junction number, because it is equal to n+sod(n) for n = 22621455099 and 22621455108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 745224 + ... + 774984.

It is an arithmetic number, because the mean of its divisors is an integer number (365626170).

Almost surely, 2^22621455144 is an apocalyptic number.

22621455144 is a gapful number since it is divisible by the number (24) 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 22621455144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35100112320).

22621455144 is an abundant number, since it is smaller than the sum of its proper divisors (47578769496).

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

22621455144 is a wasteful number, since it uses less digits than its factorization.

22621455144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29822 (or 29806 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 22621455144 its reverse (44155412622), we get a palindrome (66776867766).

The spelling of 22621455144 in words is "twenty-two billion, six hundred twenty-one million, four hundred fifty-five thousand, one hundred forty-four".