686838432991472 has 20 divisors (see below), whose sum is σ = 1330858070312760. Its totient is φ = 343391189039808.

The previous prime is 686838432991439. The next prime is 686838432991523. The reversal of 686838432991472 is 274199234838686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1751513822 + ... + 1751905917.

It is an arithmetic number, because the mean of its divisors is an integer number (66542903515638).

Almost surely, 2^{686838432991472} is an apocalyptic number.

It is an amenable number.

686838432991472 is a deficient number, since it is larger than the sum of its proper divisors (644019637321288).

686838432991472 is a wasteful number, since it uses less digits than its factorization.

686838432991472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503432000 (or 3503431994 counting only the distinct ones).

The product of its digits is 6019743744, while the sum is 80.

The spelling of 686838432991472 in words is "six hundred eighty-six trillion, eight hundred thirty-eight billion, four hundred thirty-two million, nine hundred ninety-one thousand, four hundred seventy-two".