63343632440 has 64 divisors (see below), whose sum is σ = 155630592000. Its totient is φ = 23011712640.

The previous prime is 63343632403. The next prime is 63343632491. The reversal of 63343632440 is 4423634336.

63343632440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 63343632394 and 63343632403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387881 + ... + 526439.

It is an arithmetic number, because the mean of its divisors is an integer number (2431728000).

Almost surely, 2^63343632440 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 63343632440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77815296000).

63343632440 is an abundant number, since it is smaller than the sum of its proper divisors (92286959560).

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

63343632440 is a wasteful number, since it uses less digits than its factorization.

63343632440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139620 (or 139616 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 38.

The spelling of 63343632440 in words is "sixty-three billion, three hundred forty-three million, six hundred thirty-two thousand, four hundred forty".