84178406359 has 2 divisors, whose sum is σ = 84178406360. Its totient is φ = 84178406358.

The previous prime is 84178406357. The next prime is 84178406423. The reversal of 84178406359 is 95360487148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84178406359 - 2¹ = 84178406357 is a prime.

Together with 84178406357, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84178406357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42089203179 + 42089203180.

It is an arithmetic number, because the mean of its divisors is an integer number (42089203180).

Almost surely, 2^84178406359 is an apocalyptic number.

84178406359 is a deficient number, since it is larger than the sum of its proper divisors (1).

84178406359 is an equidigital number, since it uses as much as digits as its factorization.

84178406359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 84178406359 in words is "eighty-four billion, one hundred seventy-eight million, four hundred six thousand, three hundred fifty-nine".