64542700532 has 12 divisors (see below), whose sum is σ = 113171634660. Its totient is φ = 32207947776.

The previous prime is 64542700529. The next prime is 64542700567. The reversal of 64542700532 is 23500724546.

It can be written as a sum of positive squares in 2 ways, for example, as 46004244196 + 18538456336 = 214486^2 + 136156^2 .

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, 15848333 + ... + 15852404.

It is an arithmetic number, because the mean of its divisors is an integer number (9430969555).

Almost surely, 2^64542700532 is an apocalyptic number.

It is an amenable number.

64542700532 is a deficient number, since it is larger than the sum of its proper divisors (48628934128).

64542700532 is a wasteful number, since it uses less digits than its factorization.

64542700532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31701250 (or 31701248 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 38.

The spelling of 64542700532 in words is "sixty-four billion, five hundred forty-two million, seven hundred thousand, five hundred thirty-two".