68891025841 has 27 divisors (see below), whose sum is σ = 76781807193. Its totient is φ = 61764675720.

The previous prime is 68891025799. The next prime is 68891025877. The reversal of 68891025841 is 14852019886.

It is a happy number.

The square root of 68891025841 is 262471.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 68891025841 - 2¹⁷ = 68890894769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68891028841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 308928256 + ... + 308928478.

Almost surely, 2^68891025841 is an apocalyptic number.

68891025841 is the 262471-st square number.

68891025841 is the 131236-th centered octagonal number.

It is an amenable number.

68891025841 is a deficient number, since it is larger than the sum of its proper divisors (7890781352).

68891025841 is an equidigital number, since it uses as much as digits as its factorization.

68891025841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 68891025841 in words is "sixty-eight billion, eight hundred ninety-one million, twenty-five thousand, eight hundred forty-one".