68637859278623 has 16 divisors (see below), whose sum is σ = 69663296888640. Its totient is φ = 67618096862976.

The previous prime is 68637859278539. The next prime is 68637859278631. The reversal of 68637859278623 is 32687295873686.

It is a cyclic number.

It is not a de Polignac number, because 68637859278623 - 2³⁶ = 68569139801887 is a prime.

It is a super-2 number, since 2×68637859278623² (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 (68637859278643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556282565 + ... + 556405937.

It is an arithmetic number, because the mean of its divisors is an integer number (4353956055540).

Almost surely, 2^{68637859278623} is an apocalyptic number.

68637859278623 is a deficient number, since it is larger than the sum of its proper divisors (1025437610017).

68637859278623 is a wasteful number, since it uses less digits than its factorization.

68637859278623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146306.

The product of its digits is 8778792960, while the sum is 80.

The spelling of 68637859278623 in words is "sixty-eight trillion, six hundred thirty-seven billion, eight hundred fifty-nine million, two hundred seventy-eight thousand, six hundred twenty-three".