80684435056851 has 16 divisors (see below), whose sum is σ = 119532651638400. Its totient is φ = 53789553505224.

The previous prime is 80684435056837. The next prime is 80684435056873. The reversal of 80684435056851 is 15865053448608.

80684435056851 is a `hidden beast` number, since 8 + 0 + 6 + 8 + 4 + 43 + 505 + 6 + 85 + 1 = 666.

It is not a de Polignac number, because 80684435056851 - 2⁷ = 80684435056723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80684435056811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27171520 + ... + 29994338.

It is an arithmetic number, because the mean of its divisors is an integer number (7470790727400).

Almost surely, 2^{80684435056851} is an apocalyptic number.

80684435056851 is a deficient number, since it is larger than the sum of its proper divisors (38848216581549).

80684435056851 is a wasteful number, since it uses less digits than its factorization.

80684435056851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881455 (or 3881449 counting only the distinct ones).

The product of its (nonzero) digits is 110592000, while the sum is 63.

The spelling of 80684435056851 in words is "eighty trillion, six hundred eighty-four billion, four hundred thirty-five million, fifty-six thousand, eight hundred fifty-one".