686731031950 has 24 divisors (see below), whose sum is σ = 1277370071208. Its totient is φ = 274681584480.

The previous prime is 686731031947. The next prime is 686731031951. The reversal of 686731031950 is 59130137686.

It is a super-2 number, since 2×686731031950² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686731031894 and 686731031903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686731031951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076784 + ... + 1591516.

It is an arithmetic number, because the mean of its divisors is an integer number (53223752967).

Almost surely, 2^686731031950 is an apocalyptic number.

686731031950 is a deficient number, since it is larger than the sum of its proper divisors (590639039258).

686731031950 is a wasteful number, since it uses less digits than its factorization.

686731031950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541428 (or 541423 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 686731031950 in words is "six hundred eighty-six billion, seven hundred thirty-one million, thirty-one thousand, nine hundred fifty".