726620521801 has 8 divisors (see below), whose sum is σ = 754203876608. Its totient is φ = 699296166000.

The previous prime is 726620521793. The next prime is 726620521817. The reversal of 726620521801 is 108125026627.

726620521801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 726620521801 - 2³ = 726620521793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726620561801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64744035 + ... + 64755256.

It is an arithmetic number, because the mean of its divisors is an integer number (94275484576).

Almost surely, 2^726620521801 is an apocalyptic number.

It is an amenable number.

726620521801 is a deficient number, since it is larger than the sum of its proper divisors (27583354807).

726620521801 is a wasteful number, since it uses less digits than its factorization.

726620521801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129499503.

The product of its (nonzero) digits is 80640, while the sum is 40.

It can be divided in two parts, 726620 and 521801, that added together give a palindrome (1248421).

The spelling of 726620521801 in words is "seven hundred twenty-six billion, six hundred twenty million, five hundred twenty-one thousand, eight hundred one".