68161569 has 32 divisors (see below), whose sum is σ = 110208000. Its totient is φ = 36604224.

The previous prime is 68161553. The next prime is 68161573. The reversal of 68161569 is 96516186.

It is a happy number.

It is not a de Polignac number, because 68161569 - 2⁴ = 68161553 is a prime.

It is a super-2 number, since 2×68161569² = 9291998977083522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68161569.

It is not an unprimeable number, because it can be changed into a prime (68161549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54847 + ... + 56075.

It is an arithmetic number, because the mean of its divisors is an integer number (3444000).

Almost surely, 2^68161569 is an apocalyptic number.

It is an amenable number.

68161569 is a deficient number, since it is larger than the sum of its proper divisors (42046431).

68161569 is a wasteful number, since it uses less digits than its factorization.

68161569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its digits is 77760, while the sum is 42.

The square root of 68161569 is about 8256.0019985463. The cubic root of 68161569 is about 408.4885235833.

It can be divided in two parts, 6816 and 1569, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 68161569 in words is "sixty-eight million, one hundred sixty-one thousand, five hundred sixty-nine".