64539341064 has 72 divisors (see below), whose sum is σ = 192129021630. Its totient is φ = 19557373440.

The previous prime is 64539341057. The next prime is 64539341089. The reversal of 64539341064 is 46014393546.

64539341064 is a `hidden beast` number, since 6 + 4 + 539 + 3 + 4 + 106 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 57873924900 + 6665416164 = 240570^2 + 81642^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3695337 + ... + 3712760.

Almost surely, 2^64539341064 is an apocalyptic number.

It is an amenable number.

64539341064 is an abundant number, since it is smaller than the sum of its proper divisors (127589680566).

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

64539341064 is a wasteful number, since it uses less digits than its factorization.

64539341064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408131 (or 7408113 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 64539341064 in words is "sixty-four billion, five hundred thirty-nine million, three hundred forty-one thousand, sixty-four".