77081250137 has 2 divisors, whose sum is σ = 77081250138. Its totient is φ = 77081250136.

The previous prime is 77081250061. The next prime is 77081250143. The reversal of 77081250137 is 73105218077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38640158041 + 38441092096 = 196571^2 + 196064^2 .

It is a cyclic number.

It is not a de Polignac number, because 77081250137 - 2¹² = 77081246041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77081250094 and 77081250103.

It is not a weakly prime, because it can be changed into another prime (77081250937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38540625068 + 38540625069.

It is an arithmetic number, because the mean of its divisors is an integer number (38540625069).

Almost surely, 2^77081250137 is an apocalyptic number.

It is an amenable number.

77081250137 is a deficient number, since it is larger than the sum of its proper divisors (1).

77081250137 is an equidigital number, since it uses as much as digits as its factorization.

77081250137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 77081250137 in words is "seventy-seven billion, eighty-one million, two hundred fifty thousand, one hundred thirty-seven".