720896551 has 2 divisors, whose sum is σ = 720896552. Its totient is φ = 720896550.

The previous prime is 720896503. The next prime is 720896569. The reversal of 720896551 is 155698027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720896551 - 2⁹ = 720896039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 720896498 and 720896507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720896581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360448275 + 360448276.

It is an arithmetic number, because the mean of its divisors is an integer number (360448276).

Almost surely, 2^720896551 is an apocalyptic number.

720896551 is a deficient number, since it is larger than the sum of its proper divisors (1).

720896551 is an equidigital number, since it uses as much as digits as its factorization.

720896551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 720896551 is about 26849.5167740501. The cubic root of 720896551 is about 896.6528142548.

The spelling of 720896551 in words is "seven hundred twenty million, eight hundred ninety-six thousand, five hundred fifty-one".