77633360340881 has 2 divisors, whose sum is σ = 77633360340882. Its totient is φ = 77633360340880.

The previous prime is 77633360340803. The next prime is 77633360340937. The reversal of 77633360340881 is 18804306333677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58522255200256 + 19111105140625 = 7649984^2 + 4371625^2 .

It is a cyclic number.

It is not a de Polignac number, because 77633360340881 - 2¹⁴ = 77633360324497 is a prime.

It is a super-2 number, since 2×77633360340881² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77633360340881.

It is not a weakly prime, because it can be changed into another prime (77633360345881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38816680170440 + 38816680170441.

It is an arithmetic number, because the mean of its divisors is an integer number (38816680170441).

Almost surely, 2^{77633360340881} is an apocalyptic number.

It is an amenable number.

77633360340881 is a deficient number, since it is larger than the sum of its proper divisors (1).

77633360340881 is an equidigital number, since it uses as much as digits as its factorization.

77633360340881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 59.

The spelling of 77633360340881 in words is "seventy-seven trillion, six hundred thirty-three billion, three hundred sixty million, three hundred forty thousand, eight hundred eighty-one".