73180187243 has 4 divisors (see below), whose sum is σ = 73194919560. Its totient is φ = 73165454928.

The previous prime is 73180187239. The next prime is 73180187251. The reversal of 73180187243 is 34278108137.

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

It is a cyclic number.

It is not a de Polignac number, because 73180187243 - 2² = 73180187239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73180187194 and 73180187203.

It is not an unprimeable number, because it can be changed into a prime (73180127243) 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, 7358705 + ... + 7368642.

It is an arithmetic number, because the mean of its divisors is an integer number (18298729890).

Almost surely, 2^73180187243 is an apocalyptic number.

73180187243 is a deficient number, since it is larger than the sum of its proper divisors (14732317).

73180187243 is a wasteful number, since it uses less digits than its factorization.

73180187243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14732316.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 73180187243 in words is "seventy-three billion, one hundred eighty million, one hundred eighty-seven thousand, two hundred forty-three".