720612612321331 has 8 divisors (see below), whose sum is σ = 738189081885024. Its totient is φ = 703036169052480.

The previous prime is 720612612321319. The next prime is 720612612321347. The reversal of 720612612321331 is 133123216216027.

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 720612612321331 - 2⁵ = 720612612321299 is a prime.

It is a super-2 number, since 2×720612612321331² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720612312321331) 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, 56105545 + ... + 67742581.

It is an arithmetic number, because the mean of its divisors is an integer number (92273635235628).

Almost surely, 2^{720612612321331} is an apocalyptic number.

720612612321331 is a deficient number, since it is larger than the sum of its proper divisors (17576469563693).

720612612321331 is a wasteful number, since it uses less digits than its factorization.

720612612321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13147421.

The product of its (nonzero) digits is 108864, while the sum is 40.

Adding to 720612612321331 its reverse (133123216216027), we get a palindrome (853735828537358).

The spelling of 720612612321331 in words is "seven hundred twenty trillion, six hundred twelve billion, six hundred twelve million, three hundred twenty-one thousand, three hundred thirty-one".