686370552784 has 160 divisors (see below), whose sum is σ = 1656179712000. Its totient is φ = 268871726592.

The previous prime is 686370552677. The next prime is 686370552811. The reversal of 686370552784 is 487255073686.

It is a super-2 number, since 2×686370552784² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108548247 + ... + 108554569.

It is an arithmetic number, because the mean of its divisors is an integer number (10351123200).

Almost surely, 2^686370552784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686370552784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828089856000).

686370552784 is an abundant number, since it is smaller than the sum of its proper divisors (969809159216).

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

686370552784 is a wasteful number, since it uses less digits than its factorization.

686370552784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8145 (or 8139 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 61.

The spelling of 686370552784 in words is "six hundred eighty-six billion, three hundred seventy million, five hundred fifty-two thousand, seven hundred eighty-four".