77978879750033 has 2 divisors, whose sum is σ = 77978879750034. Its totient is φ = 77978879750032.

The previous prime is 77978879750011. The next prime is 77978879750087. The reversal of 77978879750033 is 33005797887977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48532498441729 + 29446381308304 = 6966527^2 + 5426452^2 .

It is a cyclic number.

It is not a de Polignac number, because 77978879750033 - 2¹⁴ = 77978879733649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77978879750033.

It is not a weakly prime, because it can be changed into another prime (77978879150033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38989439875016 + 38989439875017.

It is an arithmetic number, because the mean of its divisors is an integer number (38989439875017).

Almost surely, 2^{77978879750033} is an apocalyptic number.

It is an amenable number.

77978879750033 is a deficient number, since it is larger than the sum of its proper divisors (1).

77978879750033 is an equidigital number, since it uses as much as digits as its factorization.

77978879750033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920736960, while the sum is 80.

The spelling of 77978879750033 in words is "seventy-seven trillion, nine hundred seventy-eight billion, eight hundred seventy-nine million, seven hundred fifty thousand, thirty-three".