685254298158 has 48 divisors (see below), whose sum is σ = 1492984761840. Its totient is φ = 227147372928.

The previous prime is 685254298117. The next prime is 685254298247. The reversal of 685254298158 is 851892452586.

It is a happy number.

685254298158 is a `hidden beast` number, since 6 + 8 + 5 + 2 + 542 + 9 + 81 + 5 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 685254298095 and 685254298104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7361341 + ... + 7453847.

It is an arithmetic number, because the mean of its divisors is an integer number (31103849205).

Almost surely, 2^685254298158 is an apocalyptic number.

685254298158 is an abundant number, since it is smaller than the sum of its proper divisors (807730463682).

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

685254298158 is a wasteful number, since it uses less digits than its factorization.

685254298158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94801 (or 94798 counting only the distinct ones).

The product of its digits is 55296000, while the sum is 63.

The spelling of 685254298158 in words is "six hundred eighty-five billion, two hundred fifty-four million, two hundred ninety-eight thousand, one hundred fifty-eight".