686459170950 has 144 divisors (see below), whose sum is σ = 2053413216000. Its totient is φ = 148646715840.

The previous prime is 686459170879. The next prime is 686459170967. The reversal of 686459170950 is 59071954686.

686459170950 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686459170950² (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 71 ways as a sum of consecutive naturals, for example, 526450 + ... + 1284549.

It is an arithmetic number, because the mean of its divisors is an integer number (14259814000).

Almost surely, 2^686459170950 is an apocalyptic number.

686459170950 is an abundant number, since it is smaller than the sum of its proper divisors (1366954045050).

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

686459170950 is a wasteful number, since it uses less digits than its factorization.

686459170950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811059 (or 1811035 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 686459170950 in words is "six hundred eighty-six billion, four hundred fifty-nine million, one hundred seventy thousand, nine hundred fifty".