77063980816 has 15 divisors (see below), whose sum is σ = 149313614293. Its totient is φ = 38531435200.

The previous prime is 77063980789. The next prime is 77063980871. The reversal of 77063980816 is 61808936077.

The square root of 77063980816 is 277604.

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., 51258771216 + 25805209600 = 226404^2 + 160640^2 .

It is a Duffinian number.

It is an unprimeable number.

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, 1075716 + ... + 1145116.

Almost surely, 2^77063980816 is an apocalyptic number.

77063980816 is the 277604-th square number.

It is an amenable number.

77063980816 is a deficient number, since it is larger than the sum of its proper divisors (72249633477).

77063980816 is an frugal number, since it uses more digits than its factorization.

77063980816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138810 (or 69403 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 77063980816 in words is "seventy-seven billion, sixty-three million, nine hundred eighty thousand, eight hundred sixteen".