68278828680431 has 4 divisors (see below), whose sum is σ = 68278859841192. Its totient is φ = 68278797519672.

The previous prime is 68278828680407. The next prime is 68278828680509. The reversal of 68278828680431 is 13408682887286.

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

It is a cyclic number.

It is not a de Polignac number, because 68278828680431 - 2¹⁰ = 68278828679407 is a prime.

It is a super-2 number, since 2×68278828680431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68278828680031) 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, 12022841 + ... + 16766226.

It is an arithmetic number, because the mean of its divisors is an integer number (17069714960298).

Almost surely, 2^{68278828680431} is an apocalyptic number.

68278828680431 is a deficient number, since it is larger than the sum of its proper divisors (31160761).

68278828680431 is a wasteful number, since it uses less digits than its factorization.

68278828680431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31160760.

The product of its (nonzero) digits is 396361728, while the sum is 71.

The spelling of 68278828680431 in words is "sixty-eight trillion, two hundred seventy-eight billion, eight hundred twenty-eight million, six hundred eighty thousand, four hundred thirty-one".