68190965956 has 27 divisors (see below), whose sum is σ = 121445963821. Its totient is φ = 33502447664.

The previous prime is 68190965903. The next prime is 68190966023. The reversal of 68190965956 is 65956909186.

The square root of 68190965956 is 261134.

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., 67698836100 + 492129856 = 260190^2 + 22184^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30812706 + ... + 30814918.

Almost surely, 2^68190965956 is an apocalyptic number.

68190965956 is the 261134-th square number.

It is an amenable number.

68190965956 is a deficient number, since it is larger than the sum of its proper divisors (53254997865).

68190965956 is an frugal number, since it uses more digits than its factorization.

68190965956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548 (or 2274 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 64.

Multiplying 68190965956 by its sum of digits (64), we get a square (4364221821184 = 2089072²).

The spelling of 68190965956 in words is "sixty-eight billion, one hundred ninety million, nine hundred sixty-five thousand, nine hundred fifty-six".