685356418090368 has 128 divisors (see below), whose sum is σ = 2030623955388000. Its totient is φ = 227563220238336.

The previous prime is 685356418090367. The next prime is 685356418090373. The reversal of 685356418090368 is 863090814653586.

685356418090368 is a `hidden beast` number, since 6 + 8 + 5 + 356 + 4 + 180 + 90 + 3 + 6 + 8 = 666.

685356418090368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 685356418090296 and 685356418090305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685356418090367) 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, 384927273 + ... + 386703656.

Almost surely, 2^{685356418090368} is an apocalyptic number.

It is an amenable number.

685356418090368 is an abundant number, since it is smaller than the sum of its proper divisors (1345267537297632).

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

685356418090368 is a wasteful number, since it uses less digits than its factorization.

685356418090368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771631209 (or 771631191 counting only the distinct ones).

The product of its (nonzero) digits is 895795200, while the sum is 72.

The spelling of 685356418090368 in words is "six hundred eighty-five trillion, three hundred fifty-six billion, four hundred eighteen million, ninety thousand, three hundred sixty-eight".