64651210520 has 64 divisors (see below), whose sum is σ = 161708279040. Its totient is φ = 23101171200.

The previous prime is 64651210433. The next prime is 64651210549. The reversal of 64651210520 is 2501215646.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1989191 + ... + 2021430.

It is an arithmetic number, because the mean of its divisors is an integer number (2526691860).

Almost surely, 2^64651210520 is an apocalyptic number.

It is an amenable number.

64651210520 is an abundant number, since it is smaller than the sum of its proper divisors (97057068520).

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

64651210520 is a wasteful number, since it uses less digits than its factorization.

64651210520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010676 (or 4010672 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 64651210520 in words is "sixty-four billion, six hundred fifty-one million, two hundred ten thousand, five hundred twenty".