84775866137 has 2 divisors, whose sum is σ = 84775866138. Its totient is φ = 84775866136.

The previous prime is 84775866121. The next prime is 84775866163. The reversal of 84775866137 is 73166857748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75754855696 + 9021010441 = 275236^2 + 94979^2 .

It is a cyclic number.

It is not a de Polignac number, because 84775866137 - 2⁴ = 84775866121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84775866137.

It is not a weakly prime, because it can be changed into another prime (84775866187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42387933068 + 42387933069.

It is an arithmetic number, because the mean of its divisors is an integer number (42387933069).

Almost surely, 2^84775866137 is an apocalyptic number.

It is an amenable number.

84775866137 is a deficient number, since it is larger than the sum of its proper divisors (1).

84775866137 is an equidigital number, since it uses as much as digits as its factorization.

84775866137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47416320, while the sum is 62.

The spelling of 84775866137 in words is "eighty-four billion, seven hundred seventy-five million, eight hundred sixty-six thousand, one hundred thirty-seven".