63444332340 has 72 divisors (see below), whose sum is σ = 197141680008. Its totient is φ = 16505840640.

The previous prime is 63444332323. The next prime is 63444332351. The reversal of 63444332340 is 4323344436.

It can be written as a sum of positive squares in 4 ways, for example, as 10928193444 + 52516138896 = 104538^2 + 229164^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 63444332295 and 63444332304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4291017 + ... + 4305776.

It is an arithmetic number, because the mean of its divisors is an integer number (2738078889).

Almost surely, 2^63444332340 is an apocalyptic number.

63444332340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63444332340 is an abundant number, since it is smaller than the sum of its proper divisors (133697347668).

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

63444332340 is a wasteful number, since it uses less digits than its factorization.

63444332340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596849 (or 8596844 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 36.

Adding to 63444332340 its reverse (4323344436), we get a palindrome (67767676776).

The spelling of 63444332340 in words is "sixty-three billion, four hundred forty-four million, three hundred thirty-two thousand, three hundred forty".