77193690568036 has 45 divisors (see below), whose sum is σ = 157596165485241. Its totient is φ = 33082641231696.

The previous prime is 77193690568021. The next prime is 77193690568037. The reversal of 77193690568036 is 63086509639177.

The square root of 77193690568036 is 8785994.

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., 72300498820900 + 4893191747136 = 8502970^2 + 2212056^2 .

It is not an unprimeable number, because it can be changed into a prime (77193690568037) by changing a digit.

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 14 ways as a sum of consecutive naturals, for example, 860982586 + ... + 861072238.

Almost surely, 2^{77193690568036} is an apocalyptic number.

77193690568036 is the 8785994-th square number.

It is an amenable number.

77193690568036 is an abundant number, since it is smaller than the sum of its proper divisors (80402474917205).

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

77193690568036 is an frugal number, since it uses more digits than its factorization.

77193690568036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179338 (or 89662 counting only the distinct ones).

The product of its (nonzero) digits is 308629440, while the sum is 70.

The spelling of 77193690568036 in words is "seventy-seven trillion, one hundred ninety-three billion, six hundred ninety million, five hundred sixty-eight thousand, thirty-six".