68855313605 has 16 divisors (see below), whose sum is σ = 94216503024. Its totient is φ = 47856000000.

The previous prime is 68855313581. The next prime is 68855313617. The reversal of 68855313605 is 50631355886.

It can be written as a sum of positive squares in 8 ways, for example, as 2422313089 + 66433000516 = 49217^2 + 257746^2 .

It is not a de Polignac number, because 68855313605 - 2¹⁴ = 68855297221 is a prime.

It is a super-3 number, since 3×68855313605³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent 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, 31155146 + ... + 31157355.

It is an arithmetic number, because the mean of its divisors is an integer number (5888531439).

Almost surely, 2^68855313605 is an apocalyptic number.

68855313605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68855313605 is a deficient number, since it is larger than the sum of its proper divisors (25361189419).

68855313605 is a wasteful number, since it uses less digits than its factorization.

68855313605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62312536.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 68855313605 in words is "sixty-eight billion, eight hundred fifty-five million, three hundred thirteen thousand, six hundred five".