68947796909 has 8 divisors (see below), whose sum is σ = 69194072472. Its totient is φ = 68701596480.

The previous prime is 68947796899. The next prime is 68947796921. The reversal of 68947796909 is 90969774986.

It can be written as a sum of positive squares in 4 ways, for example, as 15806021284 + 53141775625 = 125722^2 + 230525^2 .

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 68947796909 - 2⁸ = 68947796653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68947796009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2344919 + ... + 2374139.

It is an arithmetic number, because the mean of its divisors is an integer number (8649259059).

Almost surely, 2^68947796909 is an apocalyptic number.

It is an amenable number.

68947796909 is a deficient number, since it is larger than the sum of its proper divisors (246275563).

68947796909 is a wasteful number, since it uses less digits than its factorization.

68947796909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37567.

The product of its (nonzero) digits is 370355328, while the sum is 74.

The spelling of 68947796909 in words is "sixty-eight billion, nine hundred forty-seven million, seven hundred ninety-six thousand, nine hundred nine".