686544543038 has 16 divisors (see below), whose sum is σ = 1032993252720. Its totient is φ = 342213590400.

The previous prime is 686544543037. The next prime is 686544543071. The reversal of 686544543038 is 830345445686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686544543031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17762678 + ... + 17801286.

It is an arithmetic number, because the mean of its divisors is an integer number (64562078295).

Almost surely, 2^686544543038 is an apocalyptic number.

686544543038 is a deficient number, since it is larger than the sum of its proper divisors (346448709682).

686544543038 is a wasteful number, since it uses less digits than its factorization.

686544543038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65803.

The product of its (nonzero) digits is 33177600, while the sum is 56.

The spelling of 686544543038 in words is "six hundred eighty-six billion, five hundred forty-four million, five hundred forty-three thousand, thirty-eight".