68545581 has 16 divisors (see below), whose sum is σ = 104215104. Its totient is φ = 39700224.

The previous prime is 68545579. The next prime is 68545627. The reversal of 68545581 is 18554586.

It is not a de Polignac number, because 68545581 - 2¹ = 68545579 is a prime.

It is a super-2 number, since 2×68545581² = 9396993349255122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68545511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51031 + ... + 52356.

It is an arithmetic number, because the mean of its divisors is an integer number (6513444).

Almost surely, 2^68545581 is an apocalyptic number.

It is an amenable number.

68545581 is a deficient number, since it is larger than the sum of its proper divisors (35669523).

68545581 is a wasteful number, since it uses less digits than its factorization.

68545581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103420.

The product of its digits is 192000, while the sum is 42.

The square root of 68545581 is about 8279.2258696088. The cubic root of 68545581 is about 409.2542083729.

The spelling of 68545581 in words is "sixty-eight million, five hundred forty-five thousand, five hundred eighty-one".