84869555077 has 2 divisors, whose sum is σ = 84869555078. Its totient is φ = 84869555076.

The previous prime is 84869555063. The next prime is 84869555093. The reversal of 84869555077 is 77055596848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82741947201 + 2127607876 = 287649^2 + 46126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84869555077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84869558077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42434777538 + 42434777539.

It is an arithmetic number, because the mean of its divisors is an integer number (42434777539).

Almost surely, 2^84869555077 is an apocalyptic number.

It is an amenable number.

84869555077 is a deficient number, since it is larger than the sum of its proper divisors (1).

84869555077 is an equidigital number, since it uses as much as digits as its factorization.

84869555077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672000, while the sum is 64.

The spelling of 84869555077 in words is "eighty-four billion, eight hundred sixty-nine million, five hundred fifty-five thousand, seventy-seven".