68754721051 has 12 divisors (see below), whose sum is σ = 72583864992. Its totient is φ = 65118083184.

The previous prime is 68754721019. The next prime is 68754721081. The reversal of 68754721051 is 15012745786.

It is not a de Polignac number, because 68754721051 - 2⁵ = 68754721019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68754720992 and 68754721010.

It is not an unprimeable number, because it can be changed into a prime (68754721081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1389726 + ... + 1438348.

It is an arithmetic number, because the mean of its divisors is an integer number (6048655416).

Almost surely, 2^68754721051 is an apocalyptic number.

68754721051 is a deficient number, since it is larger than the sum of its proper divisors (3829143941).

68754721051 is a wasteful number, since it uses less digits than its factorization.

68754721051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52578 (or 52559 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 68754721051 in words is "sixty-eight billion, seven hundred fifty-four million, seven hundred twenty-one thousand, fifty-one".