68446729525 has 6 divisors (see below), whose sum is σ = 84873944642. Its totient is φ = 54757383600.

The previous prime is 68446729499. The next prime is 68446729577. The reversal of 68446729525 is 52592764486.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1283860561 + 67162868964 = 35831^2 + 259158^2 .

It is not a de Polignac number, because 68446729525 - 2¹⁷ = 68446598453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68446729525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1368934566 + ... + 1368934615.

Almost surely, 2^68446729525 is an apocalyptic number.

It is an amenable number.

68446729525 is a deficient number, since it is larger than the sum of its proper divisors (16427215117).

68446729525 is a wasteful number, since it uses less digits than its factorization.

68446729525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737869191 (or 2737869186 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 58.

The spelling of 68446729525 in words is "sixty-eight billion, four hundred forty-six million, seven hundred twenty-nine thousand, five hundred twenty-five".