77700007793 has 2 divisors, whose sum is σ = 77700007794. Its totient is φ = 77700007792.

The previous prime is 77700007771. The next prime is 77700007817. The reversal of 77700007793 is 39770000777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76172136049 + 1527871744 = 275993^2 + 39088^2 .

It is a cyclic number.

It is not a de Polignac number, because 77700007793 - 2¹² = 77700003697 is a prime.

It is a super-2 number, since 2×77700007793² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77700007093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850003896 + 38850003897.

It is an arithmetic number, because the mean of its divisors is an integer number (38850003897).

Almost surely, 2^77700007793 is an apocalyptic number.

It is an amenable number.

77700007793 is a deficient number, since it is larger than the sum of its proper divisors (1).

77700007793 is an equidigital number, since it uses as much as digits as its factorization.

77700007793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453789, while the sum is 47.

The spelling of 77700007793 in words is "seventy-seven billion, seven hundred million, seven thousand, seven hundred ninety-three".