726431989345 has 16 divisors (see below), whose sum is σ = 872724782592. Its totient is φ = 580474861120.

The previous prime is 726431989337. The next prime is 726431989373. The reversal of 726431989345 is 543989134627.

It is a happy number.

It is not a de Polignac number, because 726431989345 - 2³ = 726431989337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 58094364 + ... + 58106866.

It is an arithmetic number, because the mean of its divisors is an integer number (54545298912).

Almost surely, 2^726431989345 is an apocalyptic number.

It is an amenable number.

726431989345 is a deficient number, since it is larger than the sum of its proper divisors (146292793247).

726431989345 is a wasteful number, since it uses less digits than its factorization.

726431989345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24992.

The product of its digits is 39191040, while the sum is 61.

The spelling of 726431989345 in words is "seven hundred twenty-six billion, four hundred thirty-one million, nine hundred eighty-nine thousand, three hundred forty-five".