612242404440 has 128 divisors (see below), whose sum is σ = 1871764070400. Its totient is φ = 160151513600.

The previous prime is 612242404369. The next prime is 612242404441. The reversal of 612242404440 is 44404242216.

It is a happy number.

612242404440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612242404441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60739321 + ... + 60749399.

It is an arithmetic number, because the mean of its divisors is an integer number (14623156800).

Almost surely, 2^612242404440 is an apocalyptic number.

612242404440 is a gapful number since it is divisible by the number (60) 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 612242404440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935882035200).

612242404440 is an abundant number, since it is smaller than the sum of its proper divisors (1259521665960).

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

612242404440 is a wasteful number, since it uses less digits than its factorization.

612242404440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19697 (or 19693 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 33.

Adding to 612242404440 its reverse (44404242216), we get a palindrome (656646646656).

The spelling of 612242404440 in words is "six hundred twelve billion, two hundred forty-two million, four hundred four thousand, four hundred forty".