685370416338 has 32 divisors (see below), whose sum is σ = 1560192822720. Its totient is φ = 222884687520.

The previous prime is 685370416261. The next prime is 685370416349. The reversal of 685370416338 is 833614073586.

685370416338 is a `hidden beast` number, since 6 + 8 + 537 + 0 + 41 + 63 + 3 + 8 = 666.

685370416338 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 Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154778820 + ... + 154783247.

It is an arithmetic number, because the mean of its divisors is an integer number (48756025710).

Almost surely, 2^685370416338 is an apocalyptic number.

685370416338 is an abundant number, since it is smaller than the sum of its proper divisors (874822406382).

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

685370416338 is a wasteful number, since it uses less digits than its factorization.

685370416338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309562119 (or 309562113 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 685370416338 in words is "six hundred eighty-five billion, three hundred seventy million, four hundred sixteen thousand, three hundred thirty-eight".