65328587840 has 28 divisors (see below), whose sum is σ = 155563700556. Its totient is φ = 26131435008.

The previous prime is 65328587837. The next prime is 65328587867. The reversal of 65328587840 is 4878582356.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15781389376 + 49547198464 = 125624^2 + 222592^2 .

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, 102075599 + ... + 102076238.

Almost surely, 2^65328587840 is an apocalyptic number.

It is an amenable number.

65328587840 is an abundant number, since it is smaller than the sum of its proper divisors (90235112716).

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

65328587840 is a wasteful number, since it uses less digits than its factorization.

65328587840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204151854 (or 204151844 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 65328587840 in words is "sixty-five billion, three hundred twenty-eight million, five hundred eighty-seven thousand, eight hundred forty".