686047323841 has 4 divisors (see below), whose sum is σ = 748415262384. Its totient is φ = 623679385300.

The previous prime is 686047323821. The next prime is 686047323887. The reversal of 686047323841 is 148323740686.

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 686047323841 - 2¹³ = 686047315649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686047323821) 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, 31183969255 + ... + 31183969276.

It is an arithmetic number, because the mean of its divisors is an integer number (187103815596).

Almost surely, 2^686047323841 is an apocalyptic number.

It is an amenable number.

686047323841 is a deficient number, since it is larger than the sum of its proper divisors (62367938543).

686047323841 is a wasteful number, since it uses less digits than its factorization.

686047323841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62367938542.

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 686047323841 in words is "six hundred eighty-six billion, forty-seven million, three hundred twenty-three thousand, eight hundred forty-one".