22555440402 has 64 divisors (see below), whose sum is σ = 49917966336. Its totient is φ = 6737290560.

The previous prime is 22555440329. The next prime is 22555440407. The reversal of 22555440402 is 20404455522.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (22555440407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2531868 + ... + 2540760.

It is an arithmetic number, because the mean of its divisors is an integer number (779968224).

Almost surely, 2^22555440402 is an apocalyptic number.

22555440402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22555440402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24958983168).

22555440402 is an abundant number, since it is smaller than the sum of its proper divisors (27362525934).

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

22555440402 is a wasteful number, since it uses less digits than its factorization.

22555440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9455.

The product of its (nonzero) digits is 64000, while the sum is 33.

Adding to 22555440402 its reverse (20404455522), we get a palindrome (42959895924).

The spelling of 22555440402 in words is "twenty-two billion, five hundred fifty-five million, four hundred forty thousand, four hundred two".