64505450420 has 48 divisors (see below), whose sum is σ = 143798775120. Its totient is φ = 24221927424.

The previous prime is 64505450417. The next prime is 64505450447. The reversal of 64505450420 is 2405450546.

64505450420 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 8 ways, for example, as 1771231396 + 62734219024 = 42086^2 + 250468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111599 + ... + 376118.

It is an arithmetic number, because the mean of its divisors is an integer number (2995807815).

Almost surely, 2^64505450420 is an apocalyptic number.

It is an amenable number.

64505450420 is an abundant number, since it is smaller than the sum of its proper divisors (79293324700).

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

64505450420 is a wasteful number, since it uses less digits than its factorization.

64505450420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488132 (or 488130 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 64505450420 in words is "sixty-four billion, five hundred five million, four hundred fifty thousand, four hundred twenty".