84213604861 has 16 divisors (see below), whose sum is σ = 89677526400. Its totient is φ = 78943007808.

The previous prime is 84213604841. The next prime is 84213604879. The reversal of 84213604861 is 16840631248.

It is a cyclic number.

It is not a de Polignac number, because 84213604861 - 2¹¹ = 84213602813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84213604841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6055 + ... + 410443.

It is an arithmetic number, because the mean of its divisors is an integer number (5604845400).

Almost surely, 2^84213604861 is an apocalyptic number.

It is an amenable number.

84213604861 is a deficient number, since it is larger than the sum of its proper divisors (5463921539).

84213604861 is a wasteful number, since it uses less digits than its factorization.

84213604861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404628.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 84213604861 in words is "eighty-four billion, two hundred thirteen million, six hundred four thousand, eight hundred sixty-one".