77757736707797 has 2 divisors, whose sum is σ = 77757736707798. Its totient is φ = 77757736707796.

The previous prime is 77757736707773. The next prime is 77757736707907. The reversal of 77757736707797 is 79770763775777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51158456520196 + 26599280187601 = 7152514^2 + 5157449^2 .

It is an emirp because it is prime and its reverse (79770763775777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77757736707797 - 2¹⁴ = 77757736691413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77757736707727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38878868353898 + 38878868353899.

It is an arithmetic number, because the mean of its divisors is an integer number (38878868353899).

Almost surely, 2^{77757736707797} is an apocalyptic number.

It is an amenable number.

77757736707797 is a deficient number, since it is larger than the sum of its proper divisors (1).

77757736707797 is an equidigital number, since it uses as much as digits as its factorization.

77757736707797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32686421670, while the sum is 86.

The spelling of 77757736707797 in words is "seventy-seven trillion, seven hundred fifty-seven billion, seven hundred thirty-six million, seven hundred seven thousand, seven hundred ninety-seven".