68508561 has 16 divisors (see below), whose sum is σ = 100324800. Its totient is φ = 41238720.

The previous prime is 68508541. The next prime is 68508593. The reversal of 68508561 is 16580586.

It is not a de Polignac number, because 68508561 - 2¹¹ = 68506513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68508511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2050 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (6270300).

Almost surely, 2^68508561 is an apocalyptic number.

It is an amenable number.

68508561 is a deficient number, since it is larger than the sum of its proper divisors (31816239).

68508561 is a wasteful number, since it uses less digits than its factorization.

68508561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14096.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 68508561 is about 8276.9898513892. The cubic root of 68508561 is about 409.1805186281.

The spelling of 68508561 in words is "sixty-eight million, five hundred eight thousand, five hundred sixty-one".