8131043773439 has 4 divisors (see below), whose sum is σ = 8132666417400. Its totient is φ = 8129421129480.

The previous prime is 8131043773427. The next prime is 8131043773549. The reversal of 8131043773439 is 9343773401318.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8131043773439 is a prime.

It is a super-2 number, since 2×8131043773439² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131043713439) 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, 811314464 + ... + 811324485.

It is an arithmetic number, because the mean of its divisors is an integer number (2033166604350).

Almost surely, 2^{8131043773439} is an apocalyptic number.

8131043773439 is a deficient number, since it is larger than the sum of its proper divisors (1622643961).

8131043773439 is a wasteful number, since it uses less digits than its factorization.

8131043773439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622643960.

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 8131043773439 in words is "eight trillion, one hundred thirty-one billion, forty-three million, seven hundred seventy-three thousand, four hundred thirty-nine".