622440459136 has 64 divisors (see below), whose sum is σ = 1271129997600. Its totient is φ = 303507578880.

The previous prime is 622440459131. The next prime is 622440459139. The reversal of 622440459136 is 631954044226.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622440459131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457381 + ... + 1205851.

Almost surely, 2^622440459136 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 622440459136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635564998800).

622440459136 is an abundant number, since it is smaller than the sum of its proper divisors (648689538464).

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

622440459136 is an equidigital number, since it uses as much as digits as its factorization.

622440459136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748647 (or 748635 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 622440459136 in words is "six hundred twenty-two billion, four hundred forty million, four hundred fifty-nine thousand, one hundred thirty-six".