65331563776 has 36 divisors (see below), whose sum is σ = 134904766500. Its totient is φ = 31539372032.

The previous prime is 65331563767. The next prime is 65331563809. The reversal of 65331563776 is 67736513356.

It can be written as a sum of positive squares in 2 ways, for example, as 39910450176 + 25421113600 = 199776^2 + 159440^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4392601 + ... + 4407448.

It is an arithmetic number, because the mean of its divisors is an integer number (3747354625).

Almost surely, 2^65331563776 is an apocalyptic number.

It is an amenable number.

65331563776 is an abundant number, since it is smaller than the sum of its proper divisors (69573202724).

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

65331563776 is an equidigital number, since it uses as much as digits as its factorization.

65331563776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8800094 (or 8800080 counting only the distinct ones).

The product of its digits is 7144200, while the sum is 52.

The spelling of 65331563776 in words is "sixty-five billion, three hundred thirty-one million, five hundred sixty-three thousand, seven hundred seventy-six".