68219771005 has 8 divisors (see below), whose sum is σ = 81885172824. Its totient is φ = 54561518400.

The previous prime is 68219770991. The next prime is 68219771033. The reversal of 68219771005 is 50017791286.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6647303961 + 61572467044 = 81531^2 + 248138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68219771005 - 2²³ = 68211382397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1766286 + ... + 1804495.

It is an arithmetic number, because the mean of its divisors is an integer number (10235646603).

Almost surely, 2^68219771005 is an apocalyptic number.

It is an amenable number.

68219771005 is a deficient number, since it is larger than the sum of its proper divisors (13665401819).

68219771005 is a wasteful number, since it uses less digits than its factorization.

68219771005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574607.

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 68219771005 in words is "sixty-eight billion, two hundred nineteen million, seven hundred seventy-one thousand, five".