685426915771 has 8 divisors (see below), whose sum is σ = 738256583120. Its totient is φ = 632612179872.

The previous prime is 685426915769. The next prime is 685426915787. The reversal of 685426915771 is 177519624586.

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 685426915771 - 2¹ = 685426915769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685426915721) 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 in 7 ways as a sum of consecutive naturals, for example, 3637425 + ... + 3821218.

It is an arithmetic number, because the mean of its divisors is an integer number (92282072890).

Almost surely, 2^685426915771 is an apocalyptic number.

685426915771 is a deficient number, since it is larger than the sum of its proper divisors (52829667349).

685426915771 is a wasteful number, since it uses less digits than its factorization.

685426915771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7465725.

The product of its digits is 25401600, while the sum is 61.

The spelling of 685426915771 in words is "six hundred eighty-five billion, four hundred twenty-six million, nine hundred fifteen thousand, seven hundred seventy-one".