68087561 has 8 divisors (see below), whose sum is σ = 68859648. Its totient is φ = 67320000.

The previous prime is 68087557. The next prime is 68087597. The reversal of 68087561 is 16578086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68087561 - 2² = 68087557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68087861) 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 7 ways as a sum of consecutive naturals, for example, 35456 + ... + 37326.

It is an arithmetic number, because the mean of its divisors is an integer number (8607456).

Almost surely, 2^68087561 is an apocalyptic number.

It is an amenable number.

68087561 is a deficient number, since it is larger than the sum of its proper divisors (772087).

68087561 is a wasteful number, since it uses less digits than its factorization.

68087561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 68087561 is about 8251.5187086984. The cubic root of 68087561 is about 408.3406280894.

The spelling of 68087561 in words is "sixty-eight million, eighty-seven thousand, five hundred sixty-one".