686129355 has 48 divisors (see below), whose sum is σ = 1236268800. Its totient is φ = 351648000.

The previous prime is 686129351. The next prime is 686129393. The reversal of 686129355 is 553921686.

It is not a de Polignac number, because 686129355 - 2² = 686129351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 686129355.

It is not an unprimeable number, because it can be changed into a prime (686129351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206205 + ... + 209505.

It is an arithmetic number, because the mean of its divisors is an integer number (25755600).

Almost surely, 2^686129355 is an apocalyptic number.

686129355 is a deficient number, since it is larger than the sum of its proper divisors (550139445).

686129355 is a wasteful number, since it uses less digits than its factorization.

686129355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3489 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 686129355 is about 26194.0709894434. The cubic root of 686129355 is about 882.0001658259. Note that the first 3 decimals are identical.

The spelling of 686129355 in words is "six hundred eighty-six million, one hundred twenty-nine thousand, three hundred fifty-five".