68309352437 has 4 divisors (see below), whose sum is σ = 68430684000. Its totient is φ = 68188020876.

The previous prime is 68309352373. The next prime is 68309352439. The reversal of 68309352437 is 73425390386.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68309352437 - 2⁶ = 68309352373 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 (68309352439) 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, 60664937 + ... + 60666062.

It is an arithmetic number, because the mean of its divisors is an integer number (17107671000).

Almost surely, 2^68309352437 is an apocalyptic number.

It is an amenable number.

68309352437 is a deficient number, since it is larger than the sum of its proper divisors (121331563).

68309352437 is a wasteful number, since it uses less digits than its factorization.

68309352437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121331562.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 68309352437 in words is "sixty-eight billion, three hundred nine million, three hundred fifty-two thousand, four hundred thirty-seven".