686494506841 has 48 divisors (see below), whose sum is σ = 833020070400. Its totient is φ = 561710033280.

The previous prime is 686494506839. The next prime is 686494506847. The reversal of 686494506841 is 148605494686.

It is a happy number.

It is not a de Polignac number, because 686494506841 - 2¹ = 686494506839 is a prime.

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 686494506841.

It is not an unprimeable number, because it can be changed into a prime (686494506847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19870180 + ... + 19904698.

It is an arithmetic number, because the mean of its divisors is an integer number (17354584800).

Almost surely, 2^686494506841 is an apocalyptic number.

It is an amenable number.

686494506841 is a deficient number, since it is larger than the sum of its proper divisors (146525563559).

686494506841 is a wasteful number, since it uses less digits than its factorization.

686494506841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34870 (or 34859 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 686494506841 in words is "six hundred eighty-six billion, four hundred ninety-four million, five hundred six thousand, eight hundred forty-one".