65580039396 has 135 divisors (see below), whose sum is σ = 176230471417. Its totient is φ = 21265381440.

The previous prime is 65580039379. The next prime is 65580039407. The reversal of 65580039396 is 69393008556.

The square root of 65580039396 is 256086.

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

It can be written as a sum of positive squares in only one way, i.e., 3160013796 + 62420025600 = 56214^2 + 249840^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 188991295 + ... + 188991641.

Almost surely, 2^65580039396 is an apocalyptic number.

65580039396 is the 256086-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65580039396

65580039396 is an abundant number, since it is smaller than the sum of its proper divisors (110650432021).

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

65580039396 is an equidigital number, since it uses as much as digits as its factorization.

65580039396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 65580039396 in words is "sixty-five billion, five hundred eighty million, thirty-nine thousand, three hundred ninety-six".