84155127386789 has 2 divisors, whose sum is σ = 84155127386790. Its totient is φ = 84155127386788.

The previous prime is 84155127386719. The next prime is 84155127386809. The reversal of 84155127386789 is 98768372155148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55440801356164 + 28714326030625 = 7445858^2 + 5358575^2 .

It is a cyclic number.

It is not a de Polignac number, because 84155127386789 - 2¹⁶ = 84155127321253 is a prime.

It is a super-3 number, since 3×84155127386789³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84155127386719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42077563693394 + 42077563693395.

It is an arithmetic number, because the mean of its divisors is an integer number (42077563693395).

Almost surely, 2^{84155127386789} is an apocalyptic number.

It is an amenable number.

84155127386789 is a deficient number, since it is larger than the sum of its proper divisors (1).

84155127386789 is an equidigital number, since it uses as much as digits as its factorization.

84155127386789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 812851200, while the sum is 74.

The spelling of 84155127386789 in words is "eighty-four trillion, one hundred fifty-five billion, one hundred twenty-seven million, three hundred eighty-six thousand, seven hundred eighty-nine".