84268556641 has 2 divisors, whose sum is σ = 84268556642. Its totient is φ = 84268556640.

The previous prime is 84268556633. The next prime is 84268556707. The reversal of 84268556641 is 14665586248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84025196641 + 243360000 = 289871^2 + 15600^2 .

It is a cyclic number.

It is not a de Polignac number, because 84268556641 - 2³ = 84268556633 is a prime.

It is not a weakly prime, because it can be changed into another prime (84268551641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42134278320 + 42134278321.

It is an arithmetic number, because the mean of its divisors is an integer number (42134278321).

Almost surely, 2^84268556641 is an apocalyptic number.

It is an amenable number.

84268556641 is a deficient number, since it is larger than the sum of its proper divisors (1).

84268556641 is an equidigital number, since it uses as much as digits as its factorization.

84268556641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11059200, while the sum is 55.

The spelling of 84268556641 in words is "eighty-four billion, two hundred sixty-eight million, five hundred fifty-six thousand, six hundred forty-one".