686734451088 has 160 divisors (see below), whose sum is σ = 2047825430784. Its totient is φ = 194252138496.

The previous prime is 686734451083. The next prime is 686734451113. The reversal of 686734451088 is 880154437686.

It is a super-2 number, since 2×686734451088² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686734451083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14588806 + ... + 14635802.

Almost surely, 2^686734451088 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 686734451088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023912715392).

686734451088 is an abundant number, since it is smaller than the sum of its proper divisors (1361090979696).

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

686734451088 is a wasteful number, since it uses less digits than its factorization.

686734451088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47449 (or 47443 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 60.

The spelling of 686734451088 in words is "six hundred eighty-six billion, seven hundred thirty-four million, four hundred fifty-one thousand, eighty-eight".