720518213447 has 2 divisors, whose sum is σ = 720518213448. Its totient is φ = 720518213446.

The previous prime is 720518213419. The next prime is 720518213461. The reversal of 720518213447 is 744312815027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720518213447 - 2⁶ = 720518213383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 720518213398 and 720518213407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720518233447) 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 as a sum of consecutive naturals, namely, 360259106723 + 360259106724.

It is an arithmetic number, because the mean of its divisors is an integer number (360259106724).

Almost surely, 2^720518213447 is an apocalyptic number.

720518213447 is a deficient number, since it is larger than the sum of its proper divisors (1).

720518213447 is an equidigital number, since it uses as much as digits as its factorization.

720518213447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 720518213447 in words is "seven hundred twenty billion, five hundred eighteen million, two hundred thirteen thousand, four hundred forty-seven".