75221320712 has 16 divisors (see below), whose sum is σ = 141073804860. Its totient is φ = 37601639424.

The previous prime is 75221320711. The next prime is 75221320717. The reversal of 75221320712 is 21702312257.

It can be written as a sum of positive squares in 2 ways, for example, as 69260554276 + 5960766436 = 263174^2 + 77206^2 .

It is not an unprimeable number, because it can be changed into a prime (75221320711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092113 + ... + 1158944.

Almost surely, 2^75221320712 is an apocalyptic number.

It is an amenable number.

75221320712 is a deficient number, since it is larger than the sum of its proper divisors (65852484148).

75221320712 is a wasteful number, since it uses less digits than its factorization.

75221320712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255240 (or 2255236 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

Adding to 75221320712 its reverse (21702312257), we get a palindrome (96923632969).

The spelling of 75221320712 in words is "seventy-five billion, two hundred twenty-one million, three hundred twenty thousand, seven hundred twelve".