720651273131 has 2 divisors, whose sum is σ = 720651273132. Its totient is φ = 720651273130.

The previous prime is 720651273107. The next prime is 720651273179. The reversal of 720651273131 is 131372156027.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720651273131 - 2³⁰ = 719577531307 is a prime.

It is a super-2 number, since 2×720651273131² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (720651273431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360325636565 + 360325636566.

It is an arithmetic number, because the mean of its divisors is an integer number (360325636566).

Almost surely, 2^720651273131 is an apocalyptic number.

720651273131 is a deficient number, since it is larger than the sum of its proper divisors (1).

720651273131 is an equidigital number, since it uses as much as digits as its factorization.

720651273131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 720651273131 in words is "seven hundred twenty billion, six hundred fifty-one million, two hundred seventy-three thousand, one hundred thirty-one".