686146422081 has 8 divisors (see below), whose sum is σ = 944373570304. Its totient is φ = 442675110960.

The previous prime is 686146422053. The next prime is 686146422119. The reversal of 686146422081 is 180224641686.

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

It is not a de Polignac number, because 686146422081 - 2¹⁰ = 686146421057 is a prime.

It is a super-2 number, since 2×686146422081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686146422081.

It is not an unprimeable number, because it can be changed into a prime (686146422281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3688959166 + ... + 3688959351.

It is an arithmetic number, because the mean of its divisors is an integer number (118046696288).

Almost surely, 2^686146422081 is an apocalyptic number.

It is an amenable number.

686146422081 is a deficient number, since it is larger than the sum of its proper divisors (258227148223).

686146422081 is a wasteful number, since it uses less digits than its factorization.

686146422081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377918551.

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 686146422081 in words is "six hundred eighty-six billion, one hundred forty-six million, four hundred twenty-two thousand, eighty-one".