65645255934976 has 99 divisors (see below), whose sum is σ = 133249501635159. Its totient is φ = 32324182099968.

The previous prime is 65645255934943. The next prime is 65645255934977. The reversal of 65645255934976 is 67943955254656.

It is a happy number.

The square root of 65645255934976 is 8102176.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65645255934977) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17371063455 + ... + 17371067233.

Almost surely, 2^{65645255934976} is an apocalyptic number.

65645255934976 is the 8102176-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65645255934976

65645255934976 is an abundant number, since it is smaller than the sum of its proper divisors (67604245700183).

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

65645255934976 is an frugal number, since it uses more digits than its factorization.

65645255934976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712 (or 3848 counting only the distinct ones).

The product of its digits is 7348320000, while the sum is 76.

The spelling of 65645255934976 in words is "sixty-five trillion, six hundred forty-five billion, two hundred fifty-five million, nine hundred thirty-four thousand, nine hundred seventy-six".