63423310440 has 256 divisors, whose sum is σ = 224943390720. Its totient is φ = 13999288320.

The previous prime is 63423310421. The next prime is 63423310501. The reversal of 63423310440 is 4401332436.

It is a super-2 number, since 2×63423310440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 63423310398 and 63423310407.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 13616592 + ... + 13621248.

It is an arithmetic number, because the mean of its divisors is an integer number (878685120).

Almost surely, 2^63423310440 is an apocalyptic number.

63423310440 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 63423310440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112471695360).

63423310440 is an abundant number, since it is smaller than the sum of its proper divisors (161520080280).

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

63423310440 is a wasteful number, since it uses less digits than its factorization.

63423310440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 63423310440 its reverse (4401332436), we get a palindrome (67824642876).

The spelling of 63423310440 in words is "sixty-three billion, four hundred twenty-three million, three hundred ten thousand, four hundred forty".