73240804237 has 4 divisors (see below), whose sum is σ = 73250387100. Its totient is φ = 73231221376.

The previous prime is 73240804229. The next prime is 73240804253.

73240804237 is nontrivially palindromic in base 10.

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 1192044676 + 72048759561 = 34526^2 + 268419^2 .

It is a cyclic number.

It is not a de Polignac number, because 73240804237 - 2³ = 73240804229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73240804237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73240801237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4779958 + ... + 4795255.

It is an arithmetic number, because the mean of its divisors is an integer number (18312596775).

Almost surely, 2^73240804237 is an apocalyptic number.

It is an amenable number.

73240804237 is a deficient number, since it is larger than the sum of its proper divisors (9582863).

73240804237 is an equidigital number, since it uses as much as digits as its factorization.

73240804237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9582862.

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 73240804237 in words is "seventy-three billion, two hundred forty million, eight hundred four thousand, two hundred thirty-seven".