686232778042 has 16 divisors (see below), whose sum is σ = 1176455206080. Its totient is φ = 294085722528.

The previous prime is 686232778039. The next prime is 686232778067. The reversal of 686232778042 is 240877232686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863443 + ... + 1455334.

It is an arithmetic number, because the mean of its divisors is an integer number (73528450380).

Almost surely, 2^686232778042 is an apocalyptic number.

686232778042 is a deficient number, since it is larger than the sum of its proper divisors (490222428038).

686232778042 is a wasteful number, since it uses less digits than its factorization.

686232778042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339925.

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 686232778042 in words is "six hundred eighty-six billion, two hundred thirty-two million, seven hundred seventy-eight thousand, forty-two".