77183977109 has 2 divisors, whose sum is σ = 77183977110. Its totient is φ = 77183977108.

The previous prime is 77183977069. The next prime is 77183977121. The reversal of 77183977109 is 90177938177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51678928900 + 25505048209 = 227330^2 + 159703^2 .

It is a cyclic number.

It is not a de Polignac number, because 77183977109 - 2²⁰ = 77182928533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77183970109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38591988554 + 38591988555.

It is an arithmetic number, because the mean of its divisors is an integer number (38591988555).

Almost surely, 2^77183977109 is an apocalyptic number.

It is an amenable number.

77183977109 is a deficient number, since it is larger than the sum of its proper divisors (1).

77183977109 is an equidigital number, since it uses as much as digits as its factorization.

77183977109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4667544, while the sum is 59.

The spelling of 77183977109 in words is "seventy-seven billion, one hundred eighty-three million, nine hundred seventy-seven thousand, one hundred nine".