731440044137 has 4 divisors (see below), whose sum is σ = 797934593616. Its totient is φ = 664945494660.

The previous prime is 731440044131. The next prime is 731440044221.

731440044137 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 731440044137 - 2⁶ = 731440044073 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 731440044137.

It is not an unprimeable number, because it can be changed into a prime (731440044131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33247274723 + ... + 33247274744.

It is an arithmetic number, because the mean of its divisors is an integer number (199483648404).

Almost surely, 2^731440044137 is an apocalyptic number.

It is an amenable number.

731440044137 is a deficient number, since it is larger than the sum of its proper divisors (66494549479).

731440044137 is a wasteful number, since it uses less digits than its factorization.

731440044137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66494549478.

The product of its (nonzero) digits is 112896, while the sum is 38.

It can be divided in two parts, 7314400 and 44137, that added together give a palindrome (7358537).

The spelling of 731440044137 in words is "seven hundred thirty-one billion, four hundred forty million, forty-four thousand, one hundred thirty-seven".