686534776140 has 24 divisors (see below), whose sum is σ = 1922297373360. Its totient is φ = 183075940288.

The previous prime is 686534776049. The next prime is 686534776157. The reversal of 686534776140 is 41677435686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5721123075 + ... + 5721123194.

It is an arithmetic number, because the mean of its divisors is an integer number (80095723890).

Almost surely, 2^686534776140 is an apocalyptic number.

686534776140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686534776140 is an abundant number, since it is smaller than the sum of its proper divisors (1235762597220).

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

686534776140 is a wasteful number, since it uses less digits than its factorization.

686534776140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11442246281 (or 11442246279 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 686534776140 in words is "six hundred eighty-six billion, five hundred thirty-four million, seven hundred seventy-six thousand, one hundred forty".