85837086719977 has 2 divisors, whose sum is σ = 85837086719978. Its totient is φ = 85837086719976.

The previous prime is 85837086719963. The next prime is 85837086720029. The reversal of 85837086719977 is 77991768073858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55136134487641 + 30700952232336 = 7425371^2 + 5540844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85837086719977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85837086719894 and 85837086719903.

It is not a weakly prime, because it can be changed into another prime (85837086711977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42918543359988 + 42918543359989.

It is an arithmetic number, because the mean of its divisors is an integer number (42918543359989).

Almost surely, 2^{85837086719977} is an apocalyptic number.

It is an amenable number.

85837086719977 is a deficient number, since it is larger than the sum of its proper divisors (1).

85837086719977 is an equidigital number, since it uses as much as digits as its factorization.

85837086719977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8961684480, while the sum is 85.

The spelling of 85837086719977 in words is "eighty-five trillion, eight hundred thirty-seven billion, eighty-six million, seven hundred nineteen thousand, nine hundred seventy-seven".