77742080862757 has 2 divisors, whose sum is σ = 77742080862758. Its totient is φ = 77742080862756.

The previous prime is 77742080862751. The next prime is 77742080862767. The reversal of 77742080862757 is 75726808024777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59768500158081 + 17973580704676 = 7731009^2 + 4239526^2 .

It is a cyclic number.

It is not a de Polignac number, because 77742080862757 - 2¹⁵ = 77742080829989 is a prime.

It is a super-2 number, since 2×77742080862757² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77742080862751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38871040431378 + 38871040431379.

It is an arithmetic number, because the mean of its divisors is an integer number (38871040431379).

Almost surely, 2^{77742080862757} is an apocalyptic number.

It is an amenable number.

77742080862757 is a deficient number, since it is larger than the sum of its proper divisors (1).

77742080862757 is an equidigital number, since it uses as much as digits as its factorization.

77742080862757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516311040, while the sum is 70.

The spelling of 77742080862757 in words is "seventy-seven trillion, seven hundred forty-two billion, eighty million, eight hundred sixty-two thousand, seven hundred fifty-seven".