630840476644 has 96 divisors (see below), whose sum is σ = 1382022722304. Its totient is φ = 245771366400.

The previous prime is 630840476641. The next prime is 630840476663. The reversal of 630840476644 is 446674048036.

It is a junction number, because it is equal to n+sod(n) for n = 630840476591 and 630840476600.

It is not an unprimeable number, because it can be changed into a prime (630840476641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2282119 + ... + 2543569.

It is an arithmetic number, because the mean of its divisors is an integer number (14396070024).

Almost surely, 2^630840476644 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 630840476644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691011361152).

630840476644 is an abundant number, since it is smaller than the sum of its proper divisors (751182245660).

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

630840476644 is a wasteful number, since it uses less digits than its factorization.

630840476644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261653 (or 261651 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 52.

The spelling of 630840476644 in words is "six hundred thirty billion, eight hundred forty million, four hundred seventy-six thousand, six hundred forty-four".