68870781646051 has 64 divisors (see below), whose sum is σ = 89868351744000. Its totient is φ = 51207389291520.

The previous prime is 68870781645979. The next prime is 68870781646133. The reversal of 68870781646051 is 15064618707886.

It is not a de Polignac number, because 68870781646051 - 2⁷ = 68870781645923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68870781656051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 405139765 + ... + 405309721.

It is an arithmetic number, because the mean of its divisors is an integer number (1404192996000).

Almost surely, 2^{68870781646051} is an apocalyptic number.

68870781646051 is a deficient number, since it is larger than the sum of its proper divisors (20997570097949).

68870781646051 is a wasteful number, since it uses less digits than its factorization.

68870781646051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172132.

The product of its (nonzero) digits is 108380160, while the sum is 67.

The spelling of 68870781646051 in words is "sixty-eight trillion, eight hundred seventy billion, seven hundred eighty-one million, six hundred forty-six thousand, fifty-one".