686933309544 has 16 divisors (see below), whose sum is σ = 1717333273920. Its totient is φ = 228977769840.

The previous prime is 686933309507. The next prime is 686933309591. The reversal of 686933309544 is 445903339686.

It is a super-2 number, since 2×686933309544² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14311110592 + ... + 14311110639.

It is an arithmetic number, because the mean of its divisors is an integer number (107333329620).

Almost surely, 2^686933309544 is an apocalyptic number.

It is an amenable number.

686933309544 is an abundant number, since it is smaller than the sum of its proper divisors (1030399964376).

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

686933309544 is a wasteful number, since it uses less digits than its factorization.

686933309544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28622221240 (or 28622221236 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 60.

The spelling of 686933309544 in words is "six hundred eighty-six billion, nine hundred thirty-three million, three hundred nine thousand, five hundred forty-four".