686132744161 has 4 divisors (see below), whose sum is σ = 686134919872. Its totient is φ = 686130568452.

The previous prime is 686132744119. The next prime is 686132744173. The reversal of 686132744161 is 161447231686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 686132744161 - 2¹³ = 686132735969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686132745161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513861 + ... + 1279186.

It is an arithmetic number, because the mean of its divisors is an integer number (171533729968).

Almost surely, 2^686132744161 is an apocalyptic number.

It is an amenable number.

686132744161 is a deficient number, since it is larger than the sum of its proper divisors (2175711).

686132744161 is a wasteful number, since it uses less digits than its factorization.

686132744161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175710.

The product of its digits is 1161216, while the sum is 49.

The spelling of 686132744161 in words is "six hundred eighty-six billion, one hundred thirty-two million, seven hundred forty-four thousand, one hundred sixty-one".