685158763438620 has 144 divisors (see below), whose sum is σ = 2260043565369408. Its totient is φ = 167313809295360.

The previous prime is 685158763438607. The next prime is 685158763438621. The reversal of 685158763438620 is 26834367851586.

685158763438620 is a `hidden beast` number, since 6 + 8 + 5 + 1 + 587 + 6 + 3 + 4 + 38 + 6 + 2 + 0 = 666.

It is a super-2 number, since 2×685158763438620² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685158763438621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3025671816 + ... + 3025898255.

It is an arithmetic number, because the mean of its divisors is an integer number (15694746981732).

Almost surely, 2^{685158763438620} is an apocalyptic number.

685158763438620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685158763438620 is an abundant number, since it is smaller than the sum of its proper divisors (1574884801930788).

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

685158763438620 is a wasteful number, since it uses less digits than its factorization.

685158763438620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051570140 (or 6051570135 counting only the distinct ones).

The product of its (nonzero) digits is 1393459200, while the sum is 72.

The spelling of 685158763438620 in words is "six hundred eighty-five trillion, one hundred fifty-eight billion, seven hundred sixty-three million, four hundred thirty-eight thousand, six hundred twenty".