84651946015221 has 16 divisors (see below), whose sum is σ = 135057235808320. Its totient is φ = 52093505239920.

The previous prime is 84651946015199. The next prime is 84651946015271. The reversal of 84651946015221 is 12251064915648.

It is a happy number.

84651946015221 is a `hidden beast` number, since 8 + 4 + 6 + 5 + 1 + 9 + 4 + 601 + 5 + 2 + 21 = 666.

It is not a de Polignac number, because 84651946015221 - 2⁶ = 84651946015157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84651946015271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120586817335 + ... + 120586818036.

It is an arithmetic number, because the mean of its divisors is an integer number (8441077238020).

Almost surely, 2^{84651946015221} is an apocalyptic number.

It is an amenable number.

84651946015221 is a deficient number, since it is larger than the sum of its proper divisors (50405289793099).

84651946015221 is a wasteful number, since it uses less digits than its factorization.

84651946015221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241173635393 (or 241173635387 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 84651946015221 in words is "eighty-four trillion, six hundred fifty-one billion, nine hundred forty-six million, fifteen thousand, two hundred twenty-one".