720634010191 has 2 divisors, whose sum is σ = 720634010192. Its totient is φ = 720634010190.

The previous prime is 720634010189. The next prime is 720634010197. The reversal of 720634010191 is 191010436027.

720634010191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (191010436027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720634010191 - 2¹ = 720634010189 is a prime.

Together with 720634010189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720634010197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360317005095 + 360317005096.

It is an arithmetic number, because the mean of its divisors is an integer number (360317005096).

Almost surely, 2^720634010191 is an apocalyptic number.

720634010191 is a deficient number, since it is larger than the sum of its proper divisors (1).

720634010191 is an equidigital number, since it uses as much as digits as its factorization.

720634010191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 720634010191 in words is "seven hundred twenty billion, six hundred thirty-four million, ten thousand, one hundred ninety-one".