96777744777781 has 2 divisors, whose sum is σ = 96777744777782. Its totient is φ = 96777744777780.

The previous prime is 96777744777767. The next prime is 96777744777829. The reversal of 96777744777781 is 18777744777769.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59957533400625 + 36820211377156 = 7743225^2 + 6067966^2 .

It is an emirp because it is prime and its reverse (18777744777769) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 96777744777781 - 2¹⁹ = 96777744253493 is a prime.

It is a super-2 number, since 2×96777744777781² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 96777744777692 and 96777744777701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (96777744777731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48388872388890 + 48388872388891.

It is an arithmetic number, because the mean of its divisors is an integer number (48388872388891).

Almost surely, 2^{96777744777781} is an apocalyptic number.

It is an amenable number.

96777744777781 is a deficient number, since it is larger than the sum of its proper divisors (1).

96777744777781 is an equidigital number, since it uses as much as digits as its factorization.

96777744777781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39846304512, while the sum is 88.

The spelling of 96777744777781 in words is "ninety-six trillion, seven hundred seventy-seven billion, seven hundred forty-four million, seven hundred seventy-seven thousand, seven hundred eighty-one".