68541985 has 16 divisors (see below), whose sum is σ = 84324240. Its totient is φ = 53464320.

The previous prime is 68541973. The next prime is 68541997. The reversal of 68541985 is 58914586.

It is an interprime number because it is at equal distance from previous prime (68541973) and next prime (68541997).

It can be written as a sum of positive squares in 8 ways, for example, as 19219456 + 49322529 = 4384^2 + 7023^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68541985 is a prime.

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, 47251 + ... + 48679.

It is an arithmetic number, because the mean of its divisors is an integer number (5270265).

Almost surely, 2^68541985 is an apocalyptic number.

It is an amenable number.

68541985 is a deficient number, since it is larger than the sum of its proper divisors (15782255).

68541985 is a wasteful number, since it uses less digits than its factorization.

68541985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668.

The product of its digits is 345600, while the sum is 46.

The square root of 68541985 is about 8279.0086966979. The cubic root of 68541985 is about 409.2470515592.

It can be divided in two parts, 685419 and 85, that multiplied together give a triangular number (58260615 = T₁₀₇₉₄).

The spelling of 68541985 in words is "sixty-eight million, five hundred forty-one thousand, nine hundred eighty-five".