84210540277 has 2 divisors, whose sum is σ = 84210540278. Its totient is φ = 84210540276.

The previous prime is 84210540263. The next prime is 84210540301. The reversal of 84210540277 is 77204501248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83354041521 + 856498756 = 288711^2 + 29266^2 .

It is a cyclic number.

It is not a de Polignac number, because 84210540277 - 2⁷ = 84210540149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84210540377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42105270138 + 42105270139.

It is an arithmetic number, because the mean of its divisors is an integer number (42105270139).

Almost surely, 2^84210540277 is an apocalyptic number.

It is an amenable number.

84210540277 is a deficient number, since it is larger than the sum of its proper divisors (1).

84210540277 is an equidigital number, since it uses as much as digits as its factorization.

84210540277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 40.

The spelling of 84210540277 in words is "eighty-four billion, two hundred ten million, five hundred forty thousand, two hundred seventy-seven".