71775056528 has 30 divisors (see below), whose sum is σ = 161768528406. Its totient is φ = 30760738176.

The previous prime is 71775056489. The next prime is 71775056539. The reversal of 71775056528 is 82565057717.

It can be written as a sum of positive squares in only one way, i.e., 68451303424 + 3323753104 = 261632^2 + 57652^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 71775056528.

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 5 ways as a sum of consecutive naturals, for example, 45774125 + ... + 45775692.

Almost surely, 2^71775056528 is an apocalyptic number.

It is an amenable number.

71775056528 is an abundant number, since it is smaller than the sum of its proper divisors (89993471878).

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

71775056528 is a wasteful number, since it uses less digits than its factorization.

71775056528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91549839 (or 91549826 counting only the distinct ones).

The product of its (nonzero) digits is 4116000, while the sum is 53.

The spelling of 71775056528 in words is "seventy-one billion, seven hundred seventy-five million, fifty-six thousand, five hundred twenty-eight".