68976617956 has 9 divisors (see below), whose sum is σ = 120710000649. Its totient is φ = 34488046344.

The previous prime is 68976617951. The next prime is 68976617977. The reversal of 68976617956 is 65971667986.

The square root of 68976617956 is 262634.

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

It can be written as a sum of positive squares in only one way, i.e., 15438062500 + 53538555456 = 124250^2 + 231384^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68976617951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 459610 + ... + 590926.

Almost surely, 2^68976617956 is an apocalyptic number.

68976617956 is the 262634-th square number.

It is an amenable number.

68976617956 is a deficient number, since it is larger than the sum of its proper divisors (51733382693).

68976617956 is an frugal number, since it uses more digits than its factorization.

68976617956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262638 (or 131319 counting only the distinct ones).

The product of its digits is 205752960, while the sum is 70.

The spelling of 68976617956 in words is "sixty-eight billion, nine hundred seventy-six million, six hundred seventeen thousand, nine hundred fifty-six".