686013181886 has 16 divisors (see below), whose sum is σ = 1073802006144. Its totient is φ = 328080353304.

The previous prime is 686013181871. The next prime is 686013181901. The reversal of 686013181886 is 688181310686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (686013181871) and next prime (686013181901).

It is a super-2 number, since 2×686013181886² (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 7 ways as a sum of consecutive naturals, for example, 944801 + ... + 1504883.

It is an arithmetic number, because the mean of its divisors is an integer number (67112625384).

Almost surely, 2^686013181886 is an apocalyptic number.

686013181886 is a deficient number, since it is larger than the sum of its proper divisors (387788824258).

686013181886 is a wasteful number, since it uses less digits than its factorization.

686013181886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586735.

The product of its (nonzero) digits is 2654208, while the sum is 56.

The spelling of 686013181886 in words is "six hundred eighty-six billion, thirteen million, one hundred eighty-one thousand, eight hundred eighty-six".