691841719057 has 8 divisors (see below), whose sum is σ = 703460007936. Its totient is φ = 680319847872.

The previous prime is 691841719039. The next prime is 691841719067. The reversal of 691841719057 is 750917148196.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 691841719057 - 2¹¹ = 691841717009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 691841718992 and 691841719010.

It is not an unprimeable number, because it can be changed into a prime (691841719027) 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 7 ways as a sum of consecutive naturals, for example, 24089953 + ... + 24118654.

It is an arithmetic number, because the mean of its divisors is an integer number (87932500992).

Almost surely, 2^691841719057 is an apocalyptic number.

It is an amenable number.

691841719057 is a deficient number, since it is larger than the sum of its proper divisors (11618288879).

691841719057 is a wasteful number, since it uses less digits than its factorization.

691841719057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48208847.

The product of its (nonzero) digits is 3810240, while the sum is 58.

The spelling of 691841719057 in words is "six hundred ninety-one billion, eight hundred forty-one million, seven hundred nineteen thousand, fifty-seven".