720001431373261 has 8 divisors (see below), whose sum is σ = 751307305504320. Its totient is φ = 688695679248192.

The previous prime is 720001431373201. The next prime is 720001431373271. The reversal of 720001431373261 is 162373134100027.

It is a happy number.

720001431373261 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 720001431373261 - 2³³ = 719992841438669 is a prime.

It is a super-2 number, since 2×720001431373261² (a number of 31 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 (720001431373201) 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, 18338991 + ... + 42146428.

It is an arithmetic number, because the mean of its divisors is an integer number (93913413188040).

Almost surely, 2^{720001431373261} is an apocalyptic number.

It is an amenable number.

720001431373261 is a deficient number, since it is larger than the sum of its proper divisors (31305874131059).

720001431373261 is a wasteful number, since it uses less digits than its factorization.

720001431373261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61002995.

The product of its (nonzero) digits is 127008, while the sum is 40.

Adding to 720001431373261 its reverse (162373134100027), we get a palindrome (882374565473288).

The spelling of 720001431373261 in words is "seven hundred twenty trillion, one billion, four hundred thirty-one million, three hundred seventy-three thousand, two hundred sixty-one".