686387162958 has 32 divisors (see below), whose sum is σ = 1569619302144. Its totient is φ = 196018823232.

The previous prime is 686387162917. The next prime is 686387162959. The reversal of 686387162958 is 859261783686.

It is a happy number.

It is a super-2 number, since 2×686387162958² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 686387162892 and 686387162901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686387162959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3733960 + ... + 3913467.

It is an arithmetic number, because the mean of its divisors is an integer number (49050603192).

Almost surely, 2^686387162958 is an apocalyptic number.

686387162958 is an abundant number, since it is smaller than the sum of its proper divisors (883232139186).

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

686387162958 is a wasteful number, since it uses less digits than its factorization.

686387162958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649576.

The product of its digits is 209018880, while the sum is 69.

The spelling of 686387162958 in words is "six hundred eighty-six billion, three hundred eighty-seven million, one hundred sixty-two thousand, nine hundred fifty-eight".