73791581231 has 4 divisors (see below), whose sum is σ = 73792142832. Its totient is φ = 73791019632.

The previous prime is 73791581179. The next prime is 73791581243. The reversal of 73791581231 is 13218519737.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 73791581231 - 2⁶ = 73791581167 is a prime.

It is a super-3 number, since 3×73791581231³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73791581251) 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 3 ways as a sum of consecutive naturals, for example, 33731 + ... + 385643.

It is an arithmetic number, because the mean of its divisors is an integer number (18448035708).

Almost surely, 2^73791581231 is an apocalyptic number.

73791581231 is a deficient number, since it is larger than the sum of its proper divisors (561601).

73791581231 is a wasteful number, since it uses less digits than its factorization.

73791581231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561600.

The product of its digits is 317520, while the sum is 47.

The spelling of 73791581231 in words is "seventy-three billion, seven hundred ninety-one million, five hundred eighty-one thousand, two hundred thirty-one".