64641064148 has 12 divisors (see below), whose sum is σ = 117022616340. Its totient is φ = 31206030912.

The previous prime is 64641064121. The next prime is 64641064151. The reversal of 64641064148 is 84146014646.

64641064148 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 15635501764 + 49005562384 = 125042^2 + 221372^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64641064099 and 64641064108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278625161 + ... + 278625392.

It is an arithmetic number, because the mean of its divisors is an integer number (9751884695).

Almost surely, 2^64641064148 is an apocalyptic number.

It is an amenable number.

64641064148 is a deficient number, since it is larger than the sum of its proper divisors (52381552192).

64641064148 is a wasteful number, since it uses less digits than its factorization.

64641064148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557250586 (or 557250584 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 64641064148 in words is "sixty-four billion, six hundred forty-one million, sixty-four thousand, one hundred forty-eight".