68651731871 has 16 divisors (see below), whose sum is σ = 72057729600. Its totient is φ = 65315980800.

The previous prime is 68651731867. The next prime is 68651731877. The reversal of 68651731871 is 17813715686.

It is not a de Polignac number, because 68651731871 - 2² = 68651731867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68651731877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4375781 + ... + 4391441.

It is an arithmetic number, because the mean of its divisors is an integer number (4503608100).

Almost surely, 2^68651731871 is an apocalyptic number.

68651731871 is a deficient number, since it is larger than the sum of its proper divisors (3405997729).

68651731871 is a wasteful number, since it uses less digits than its factorization.

68651731871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17890.

The product of its digits is 1693440, while the sum is 53.

The spelling of 68651731871 in words is "sixty-eight billion, six hundred fifty-one million, seven hundred thirty-one thousand, eight hundred seventy-one".