68437708349 has 4 divisors (see below), whose sum is σ = 69262259136. Its totient is φ = 67613157564.

The previous prime is 68437708307. The next prime is 68437708393. The reversal of 68437708349 is 94380773486.

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 68437708349 - 2¹⁶ = 68437642813 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 (68437701349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412275269 + ... + 412275434.

It is an arithmetic number, because the mean of its divisors is an integer number (17315564784).

Almost surely, 2^68437708349 is an apocalyptic number.

It is an amenable number.

68437708349 is a deficient number, since it is larger than the sum of its proper divisors (824550787).

68437708349 is an equidigital number, since it uses as much as digits as its factorization.

68437708349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824550786.

The product of its (nonzero) digits is 24385536, while the sum is 59.

The spelling of 68437708349 in words is "sixty-eight billion, four hundred thirty-seven million, seven hundred eight thousand, three hundred forty-nine".