64431633043340 has 24 divisors (see below), whose sum is σ = 135354427533360. Its totient is φ = 25763510714048.

The previous prime is 64431633043333. The next prime is 64431633043357. The reversal of 64431633043340 is 4334033613446.

64431633043340 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 = 64431633043291 and 64431633043300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571348667 + ... + 571461426.

It is an arithmetic number, because the mean of its divisors is an integer number (5639767813890).

Almost surely, 2^{64431633043340} is an apocalyptic number.

It is an amenable number.

64431633043340 is an abundant number, since it is smaller than the sum of its proper divisors (70922794490020).

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

64431633043340 is a wasteful number, since it uses less digits than its factorization.

64431633043340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142812921 (or 1142812919 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 44.

Adding to 64431633043340 its reverse (4334033613446), we get a palindrome (68765666656786).

The spelling of 64431633043340 in words is "sixty-four trillion, four hundred thirty-one billion, six hundred thirty-three million, forty-three thousand, three hundred forty".