68198131502656 has 63 divisors (see below), whose sum is σ = 135598243974547. Its totient is φ = 34031777807360.

The previous prime is 68198131502587. The next prime is 68198131502687. The reversal of 68198131502656 is 65620513189186.

It is a happy number.

The square root of 68198131502656 is 8258216.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 702311041600 + 67495820461056 = 838040^2 + 8215584^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68198131502594 and 68198131502603.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 62167849500 + ... + 62167850596.

Almost surely, 2^{68198131502656} is an apocalyptic number.

68198131502656 is the 8258216-th square number.

It is an amenable number.

68198131502656 is a deficient number, since it is larger than the sum of its proper divisors (67400112471891).

68198131502656 is an frugal number, since it uses more digits than its factorization.

68198131502656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 61.

The spelling of 68198131502656 in words is "sixty-eight trillion, one hundred ninety-eight billion, one hundred thirty-one million, five hundred two thousand, six hundred fifty-six".