73220891752 has 8 divisors (see below), whose sum is σ = 137289172050. Its totient is φ = 36610445872.

The previous prime is 73220891747. The next prime is 73220891753. The reversal of 73220891752 is 25719802237.

It can be written as a sum of positive squares in only one way, i.e., 53321275396 + 19899616356 = 230914^2 + 141066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×73220891752² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (73220891753) by changing a digit.

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 as a sum of consecutive naturals, namely, 4576305727 + ... + 4576305742.

Almost surely, 2^73220891752 is an apocalyptic number.

It is an amenable number.

73220891752 is a deficient number, since it is larger than the sum of its proper divisors (64068280298).

73220891752 is a wasteful number, since it uses less digits than its factorization.

73220891752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9152611475 (or 9152611471 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 73220891752 in words is "seventy-three billion, two hundred twenty million, eight hundred ninety-one thousand, seven hundred fifty-two".