686540324740 has 48 divisors (see below), whose sum is σ = 1448336010240. Its totient is φ = 273359640960.

The previous prime is 686540324689. The next prime is 686540324741. The reversal of 686540324740 is 47423045686.

It is not an unprimeable number, because it can be changed into a prime (686540324741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12740494 + ... + 12794266.

It is an arithmetic number, because the mean of its divisors is an integer number (30173666880).

Almost surely, 2^686540324740 is an apocalyptic number.

It is an amenable number.

686540324740 is an abundant number, since it is smaller than the sum of its proper divisors (761795685500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686540324740 is a wasteful number, since it uses less digits than its factorization.

686540324740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56692 (or 56690 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 686540324740 in words is "six hundred eighty-six billion, five hundred forty million, three hundred twenty-four thousand, seven hundred forty".