686232777863 has 4 divisors (see below), whose sum is σ = 686271087888. Its totient is φ = 686194467840.

The previous prime is 686232777827. The next prime is 686232777877. The reversal of 686232777863 is 368777232686.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686232777863 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 686232777863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686232777823) 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, 19128131 + ... + 19163972.

It is an arithmetic number, because the mean of its divisors is an integer number (171567771972).

Almost surely, 2^686232777863 is an apocalyptic number.

686232777863 is a deficient number, since it is larger than the sum of its proper divisors (38310025).

686232777863 is a wasteful number, since it uses less digits than its factorization.

686232777863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38310024.

The product of its digits is 170698752, while the sum is 65.

The spelling of 686232777863 in words is "six hundred eighty-six billion, two hundred thirty-two million, seven hundred seventy-seven thousand, eight hundred sixty-three".