716809745491 has 4 divisors (see below), whose sum is σ = 819211137712. Its totient is φ = 614408353272.

The previous prime is 716809745479. The next prime is 716809745501. The reversal of 716809745491 is 194547908617.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 716809745491 - 2⁹ = 716809744979 is a prime.

It is a super-2 number, since 2×716809745491² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (716809745401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51200696100 + ... + 51200696113.

It is an arithmetic number, because the mean of its divisors is an integer number (204802784428).

Almost surely, 2^716809745491 is an apocalyptic number.

716809745491 is a deficient number, since it is larger than the sum of its proper divisors (102401392221).

716809745491 is a wasteful number, since it uses less digits than its factorization.

716809745491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102401392220.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 716809745491 in words is "seven hundred sixteen billion, eight hundred nine million, seven hundred forty-five thousand, four hundred ninety-one".