73236401321 has 8 divisors (see below), whose sum is σ = 75792454920. Its totient is φ = 70682391808.

The previous prime is 73236401317. The next prime is 73236401333. The reversal of 73236401321 is 12310463237.

It can be written as a sum of positive squares in 4 ways, for example, as 15634001296 + 57602400025 = 125036^2 + 240005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73236401321 - 2² = 73236401317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73236401311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437936 + ... + 581601.

It is an arithmetic number, because the mean of its divisors is an integer number (9474056865).

Almost surely, 2^73236401321 is an apocalyptic number.

It is an amenable number.

73236401321 is a deficient number, since it is larger than the sum of its proper divisors (2556053599).

73236401321 is a wasteful number, since it uses less digits than its factorization.

73236401321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022043.

The product of its (nonzero) digits is 18144, while the sum is 32.

Adding to 73236401321 its reverse (12310463237), we get a palindrome (85546864558).

The spelling of 73236401321 in words is "seventy-three billion, two hundred thirty-six million, four hundred one thousand, three hundred twenty-one".