77700080749 has 2 divisors, whose sum is σ = 77700080750. Its totient is φ = 77700080748.

The previous prime is 77700080747. The next prime is 77700080797. The reversal of 77700080749 is 94708000777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42562578249 + 35137502500 = 206307^2 + 187450^2 .

It is a cyclic number.

It is not a de Polignac number, because 77700080749 - 2¹ = 77700080747 is a prime.

It is a super-2 number, since 2×77700080749² (a number of 23 digits) contains 22 as substring.

Together with 77700080747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77700080747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850040374 + 38850040375.

It is an arithmetic number, because the mean of its divisors is an integer number (38850040375).

Almost surely, 2^77700080749 is an apocalyptic number.

It is an amenable number.

77700080749 is a deficient number, since it is larger than the sum of its proper divisors (1).

77700080749 is an equidigital number, since it uses as much as digits as its factorization.

77700080749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691488, while the sum is 49.

The spelling of 77700080749 in words is "seventy-seven billion, seven hundred million, eighty thousand, seven hundred forty-nine".