726540207420407 has 4 divisors (see below), whose sum is σ = 731167852053816. Its totient is φ = 721912562787000.

The previous prime is 726540207420389. The next prime is 726540207420431. The reversal of 726540207420407 is 704024702045627.

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 726540207420407 - 2¹⁴ = 726540207404023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726540237420407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2313822316469 + ... + 2313822316782.

It is an arithmetic number, because the mean of its divisors is an integer number (182791963013454).

Almost surely, 2^{726540207420407} is an apocalyptic number.

726540207420407 is a deficient number, since it is larger than the sum of its proper divisors (4627644633409).

726540207420407 is a wasteful number, since it uses less digits than its factorization.

726540207420407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4627644633408.

The product of its (nonzero) digits is 5268480, while the sum is 50.

The spelling of 726540207420407 in words is "seven hundred twenty-six trillion, five hundred forty billion, two hundred seven million, four hundred twenty thousand, four hundred seven".