720388783577 has 2 divisors, whose sum is σ = 720388783578. Its totient is φ = 720388783576.

The previous prime is 720388783553. The next prime is 720388783579. The reversal of 720388783577 is 775387883027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655393870096 + 64994913481 = 809564^2 + 254941^2 .

It is a cyclic number.

It is not a de Polignac number, because 720388783577 - 2¹⁴ = 720388767193 is a prime.

Together with 720388783579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (720388783579) 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, 360194391788 + 360194391789.

It is an arithmetic number, because the mean of its divisors is an integer number (360194391789).

Almost surely, 2^720388783577 is an apocalyptic number.

It is an amenable number.

720388783577 is a deficient number, since it is larger than the sum of its proper divisors (1).

720388783577 is an equidigital number, since it uses as much as digits as its factorization.

720388783577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110638080, while the sum is 65.

The spelling of 720388783577 in words is "seven hundred twenty billion, three hundred eighty-eight million, seven hundred eighty-three thousand, five hundred seventy-seven".