73272503021 has 4 divisors (see below), whose sum is σ = 74655003132. Its totient is φ = 71890002912.

The previous prime is 73272502987. The next prime is 73272503041. The reversal of 73272503021 is 12030527237.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40971427396 + 32301075625 = 202414^2 + 179725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73272503021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73272503041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691249976 + ... + 691250081.

It is an arithmetic number, because the mean of its divisors is an integer number (18663750783).

Almost surely, 2^73272503021 is an apocalyptic number.

It is an amenable number.

73272503021 is a deficient number, since it is larger than the sum of its proper divisors (1382500111).

73272503021 is a wasteful number, since it uses less digits than its factorization.

73272503021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382500110.

The product of its (nonzero) digits is 17640, while the sum is 32.

The spelling of 73272503021 in words is "seventy-three billion, two hundred seventy-two million, five hundred three thousand, twenty-one".