85436562077 has 2 divisors, whose sum is σ = 85436562078. Its totient is φ = 85436562076.

The previous prime is 85436562047. The next prime is 85436562083. The reversal of 85436562077 is 77026563458.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66734905561 + 18701656516 = 258331^2 + 136754^2 .

It is a cyclic number.

It is not a de Polignac number, because 85436562077 - 2²² = 85432367773 is a prime.

It is a super-2 number, since 2×85436562077² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85436562007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42718281038 + 42718281039.

It is an arithmetic number, because the mean of its divisors is an integer number (42718281039).

Almost surely, 2^85436562077 is an apocalyptic number.

It is an amenable number.

85436562077 is a deficient number, since it is larger than the sum of its proper divisors (1).

85436562077 is an equidigital number, since it uses as much as digits as its factorization.

85436562077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 85436562077 in words is "eighty-five billion, four hundred thirty-six million, five hundred sixty-two thousand, seventy-seven".