686630273524 has 24 divisors (see below), whose sum is σ = 1295734490568. Its totient is φ = 316489827840.

The previous prime is 686630273489. The next prime is 686630273551. The reversal of 686630273524 is 425372036686.

It can be written as a sum of positive squares in 4 ways, for example, as 76075569124 + 610554704400 = 275818^2 + 781380^2 .

It is a super-2 number, since 2×686630273524² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8636137 + ... + 8715280.

It is an arithmetic number, because the mean of its divisors is an integer number (53988937107).

Almost surely, 2^686630273524 is an apocalyptic number.

It is an amenable number.

686630273524 is a deficient number, since it is larger than the sum of its proper divisors (609104217044).

686630273524 is a wasteful number, since it uses less digits than its factorization.

686630273524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17352195 (or 17352193 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 52.

The spelling of 686630273524 in words is "six hundred eighty-six billion, six hundred thirty million, two hundred seventy-three thousand, five hundred twenty-four".