68210653697 has 4 divisors (see below), whose sum is σ = 70054184916. Its totient is φ = 66367122480.

The previous prime is 68210653691. The next prime is 68210653711. The reversal of 68210653697 is 79635601286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32114073616 + 36096580081 = 179204^2 + 189991^2 .

It is a cyclic number.

It is not a de Polignac number, because 68210653697 - 2²⁴ = 68193876481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68210653691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921765554 + ... + 921765627.

It is an arithmetic number, because the mean of its divisors is an integer number (17513546229).

Almost surely, 2^68210653697 is an apocalyptic number.

It is an amenable number.

68210653697 is a deficient number, since it is larger than the sum of its proper divisors (1843531219).

68210653697 is a wasteful number, since it uses less digits than its factorization.

68210653697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843531218.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 68210653697 in words is "sixty-eight billion, two hundred ten million, six hundred fifty-three thousand, six hundred ninety-seven".