64130804175440 has 20 divisors (see below), whose sum is σ = 149104119708084. Its totient is φ = 25652321670144.

The previous prime is 64130804175437. The next prime is 64130804175469. The reversal of 64130804175440 is 4457140803146.

64130804175440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9372757758016 + 54758046417424 = 3061496^2 + 7399868^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×64130804175440² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 400817526017 + ... + 400817526176.

Almost surely, 2^{64130804175440} is an apocalyptic number.

It is an amenable number.

64130804175440 is an abundant number, since it is smaller than the sum of its proper divisors (84973315532644).

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

64130804175440 is a wasteful number, since it uses less digits than its factorization.

64130804175440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801635052206 (or 801635052200 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

Adding to 64130804175440 its reverse (4457140803146), we get a palindrome (68587944978586).

The spelling of 64130804175440 in words is "sixty-four trillion, one hundred thirty billion, eight hundred four million, one hundred seventy-five thousand, four hundred forty".