64060465640 has 16 divisors (see below), whose sum is σ = 144136047780. Its totient is φ = 25624186240.

The previous prime is 64060465603. The next prime is 64060465649. The reversal of 64060465640 is 4656406046.

64060465640 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 58582393444 + 5478072196 = 242038^2 + 74014^2 .

It is not an unprimeable number, because it can be changed into a prime (64060465649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800755781 + ... + 800755860.

Almost surely, 2^64060465640 is an apocalyptic number.

It is an amenable number.

64060465640 is an abundant number, since it is smaller than the sum of its proper divisors (80075582140).

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

64060465640 is a wasteful number, since it uses less digits than its factorization.

64060465640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601511652 (or 1601511648 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 64060465640 in words is "sixty-four billion, sixty million, four hundred sixty-five thousand, six hundred forty".