68648476816980 has 72 divisors (see below), whose sum is σ = 209384175613704. Its totient is φ = 18205120915200.

The previous prime is 68648476816973. The next prime is 68648476816991. The reversal of 68648476816980 is 8961867484686.

It is a happy number.

68648476816980 is a `hidden beast` number, since 6 + 8 + 6 + 4 + 8 + 476 + 8 + 1 + 69 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3884675437764 + 64763801379216 = 1970958^2 + 8047596^2 .

It is a super-2 number, since 2×68648476816980² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68648476816980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1053504511 + ... + 1053569670.

Almost surely, 2^{68648476816980} is an apocalyptic number.

68648476816980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68648476816980 is an abundant number, since it is smaller than the sum of its proper divisors (140735698796724).

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

68648476816980 is a wasteful number, since it uses less digits than its factorization.

68648476816980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107074377 (or 2107074372 counting only the distinct ones).

The product of its (nonzero) digits is 5350883328, while the sum is 81.

The spelling of 68648476816980 in words is "sixty-eight trillion, six hundred forty-eight billion, four hundred seventy-six million, eight hundred sixteen thousand, nine hundred eighty".