720255400135431 has 8 divisors (see below), whose sum is σ = 960341707543680. Its totient is φ = 480169679742072.

The previous prime is 720255400135409. The next prime is 720255400135457. The reversal of 720255400135431 is 134531004552027.

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

It is a de Polignac number, because none of the positive numbers 2^k-720255400135431 is a prime.

It is a super-2 number, since 2×720255400135431² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720255400135471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143882745 + ... + 148804418.

It is an arithmetic number, because the mean of its divisors is an integer number (120042713442960).

Almost surely, 2^{720255400135431} is an apocalyptic number.

720255400135431 is a deficient number, since it is larger than the sum of its proper divisors (240086307408249).

720255400135431 is a wasteful number, since it uses less digits than its factorization.

720255400135431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293507445.

The product of its (nonzero) digits is 504000, while the sum is 42.

Adding to 720255400135431 its reverse (134531004552027), we get a palindrome (854786404687458).

The spelling of 720255400135431 in words is "seven hundred twenty trillion, two hundred fifty-five billion, four hundred million, one hundred thirty-five thousand, four hundred thirty-one".