686044747854 has 24 divisors (see below), whose sum is σ = 1526604080040. Its totient is φ = 222500999088.

The previous prime is 686044747831. The next prime is 686044747859. The reversal of 686044747854 is 458747440686.

686044747854 is a `hidden beast` number, since 6 + 86 + 0 + 4 + 474 + 7 + 85 + 4 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 686044747791 and 686044747800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686044747859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515047944 + ... + 515049275.

It is an arithmetic number, because the mean of its divisors is an integer number (63608503335).

Almost surely, 2^686044747854 is an apocalyptic number.

686044747854 is an abundant number, since it is smaller than the sum of its proper divisors (840559332186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686044747854 is a wasteful number, since it uses less digits than its factorization.

686044747854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030097264 (or 1030097261 counting only the distinct ones).

The product of its (nonzero) digits is 144506880, while the sum is 63.

The spelling of 686044747854 in words is "six hundred eighty-six billion, forty-four million, seven hundred forty-seven thousand, eight hundred fifty-four".