68871797480 has 16 divisors (see below), whose sum is σ = 154961544420. Its totient is φ = 27548718976.

The previous prime is 68871797419. The next prime is 68871797509. The reversal of 68871797480 is 8479717886.

It can be written as a sum of positive squares in 2 ways, for example, as 65719424164 + 3152373316 = 256358^2 + 56146^2 .

It is a super-2 number, since 2×68871797480² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 860897429 + ... + 860897508.

Almost surely, 2^68871797480 is an apocalyptic number.

It is an amenable number.

68871797480 is an abundant number, since it is smaller than the sum of its proper divisors (86089746940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68871797480 is a wasteful number, since it uses less digits than its factorization.

68871797480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721794948 (or 1721794944 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 65.

The spelling of 68871797480 in words is "sixty-eight billion, eight hundred seventy-one million, seven hundred ninety-seven thousand, four hundred eighty".