68521278790 has 16 divisors (see below), whose sum is σ = 123424638480. Its totient is φ = 27389325600.

The previous prime is 68521278733. The next prime is 68521278809. The reversal of 68521278790 is 9787212586.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2383236 + ... + 2411815.

It is an arithmetic number, because the mean of its divisors is an integer number (7714039905).

Almost surely, 2^68521278790 is an apocalyptic number.

68521278790 is a deficient number, since it is larger than the sum of its proper divisors (54903359690).

68521278790 is a wasteful number, since it uses less digits than its factorization.

68521278790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796487.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 68521278790 in words is "sixty-eight billion, five hundred twenty-one million, two hundred seventy-eight thousand, seven hundred ninety".