68437911749 has 4 divisors (see below), whose sum is σ = 70029491136. Its totient is φ = 66846332364.

The previous prime is 68437911743. The next prime is 68437911761. The reversal of 68437911749 is 94711973486.

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 68437911749 - 2¹² = 68437907653 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 (68437911743) 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, 795789629 + ... + 795789714.

It is an arithmetic number, because the mean of its divisors is an integer number (17507372784).

Almost surely, 2^68437911749 is an apocalyptic number.

It is an amenable number.

68437911749 is a deficient number, since it is larger than the sum of its proper divisors (1591579387).

68437911749 is a wasteful number, since it uses less digits than its factorization.

68437911749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591579386.

The product of its digits is 9144576, while the sum is 59.

The spelling of 68437911749 in words is "sixty-eight billion, four hundred thirty-seven million, nine hundred eleven thousand, seven hundred forty-nine".