75721316 has 36 divisors (see below), whose sum is σ = 147191100. Its totient is φ = 34056000.

The previous prime is 75721309. The next prime is 75721339. The reversal of 75721316 is 61312757.

It can be written as a sum of positive squares in 2 ways, for example, as 53348416 + 22372900 = 7304^2 + 4730^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 48110 + ... + 49658.

Almost surely, 2^75721316 is an apocalyptic number.

It is an amenable number.

75721316 is a deficient number, since it is larger than the sum of its proper divisors (71469784).

75721316 is a wasteful number, since it uses less digits than its factorization.

75721316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1663 counting only the distinct ones).

The product of its digits is 8820, while the sum is 32.

The square root of 75721316 is about 8701.7995839941. The cubic root of 75721316 is about 423.0639803220.

It can be divided in two parts, 7572 and 1316, that added together give a palindrome (8888).

The spelling of 75721316 in words is "seventy-five million, seven hundred twenty-one thousand, three hundred sixteen".