65464516928440 has 384 divisors, whose sum is σ = 176275468797120. Its totient is φ = 21803804467200.

The previous prime is 65464516928431. The next prime is 65464516928497. The reversal of 65464516928440 is 4482961546456.

65464516928440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 95 ways as a sum of consecutive naturals, for example, 24309139734 + ... + 24309142426.

Almost surely, 2^{65464516928440} 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 65464516928440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88137734398560).

65464516928440 is an abundant number, since it is smaller than the sum of its proper divisors (110810951868680).

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

65464516928440 is a wasteful number, since it uses less digits than its factorization.

65464516928440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 64.

The spelling of 65464516928440 in words is "sixty-five trillion, four hundred sixty-four billion, five hundred sixteen million, nine hundred twenty-eight thousand, four hundred forty".