64548733128 has 32 divisors (see below), whose sum is σ = 176042000160. Its totient is φ = 19560222080.

The previous prime is 64548733121. The next prime is 64548733187. The reversal of 64548733128 is 82133784546.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64548733121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122251125 + ... + 122251652.

It is an arithmetic number, because the mean of its divisors is an integer number (5501312505).

Almost surely, 2^64548733128 is an apocalyptic number.

It is an amenable number.

64548733128 is an abundant number, since it is smaller than the sum of its proper divisors (111493267032).

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

64548733128 is a wasteful number, since it uses less digits than its factorization.

64548733128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244502797 (or 244502793 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The spelling of 64548733128 in words is "sixty-four billion, five hundred forty-eight million, seven hundred thirty-three thousand, one hundred twenty-eight".