68027104938649 has 4 divisors (see below), whose sum is σ = 68027571909136. Its totient is φ = 68026637968164.

The previous prime is 68027104938623. The next prime is 68027104938731. The reversal of 68027104938649 is 94683940172086.

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 68027104938649 - 2¹⁹ = 68027104414361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68027104938349) 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, 233266659 + ... + 233558104.

It is an arithmetic number, because the mean of its divisors is an integer number (17006892977284).

Almost surely, 2^{68027104938649} is an apocalyptic number.

It is an amenable number.

68027104938649 is a deficient number, since it is larger than the sum of its proper divisors (466970487).

68027104938649 is a wasteful number, since it uses less digits than its factorization.

68027104938649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466970486.

The product of its (nonzero) digits is 125411328, while the sum is 67.

The spelling of 68027104938649 in words is "sixty-eight trillion, twenty-seven billion, one hundred four million, nine hundred thirty-eight thousand, six hundred forty-nine".