65319091776 has 189 divisors, whose sum is σ = 196143173499. Its totient is φ = 20781395712.

The previous prime is 65319091769. The next prime is 65319091811. The reversal of 65319091776 is 67719091356.

It is a happy number.

The square root of 65319091776 is 255576.

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

65319091776 is a `hidden beast` number, since 6 + 531 + 90 + 9 + 17 + 7 + 6 = 666.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 141077721 + ... + 141078183.

Almost surely, 2^65319091776 is an apocalyptic number.

65319091776 is the 255576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65319091776

65319091776 is an abundant number, since it is smaller than the sum of its proper divisors (130824081723).

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

65319091776 is an equidigital number, since it uses as much as digits as its factorization.

65319091776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The spelling of 65319091776 in words is "sixty-five billion, three hundred nineteen million, ninety-one thousand, seven hundred seventy-six".