84550034521 has 2 divisors, whose sum is σ = 84550034522. Its totient is φ = 84550034520.

The previous prime is 84550034507. The next prime is 84550034537. The reversal of 84550034521 is 12543005548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84222424521 + 327610000 = 290211^2 + 18100^2 .

It is a cyclic number.

It is not a de Polignac number, because 84550034521 - 2⁵ = 84550034489 is a prime.

It is not a weakly prime, because it can be changed into another prime (84550034221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42275017260 + 42275017261.

It is an arithmetic number, because the mean of its divisors is an integer number (42275017261).

Almost surely, 2^84550034521 is an apocalyptic number.

It is an amenable number.

84550034521 is a deficient number, since it is larger than the sum of its proper divisors (1).

84550034521 is an equidigital number, since it uses as much as digits as its factorization.

84550034521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 84550034521 in words is "eighty-four billion, five hundred fifty million, thirty-four thousand, five hundred twenty-one".