84578957805 has 32 divisors (see below), whose sum is σ = 142935085440. Its totient is φ = 42588737280.

The previous prime is 84578957803. The next prime is 84578957807. The reversal of 84578957805 is 50875987548.

It is an interprime number because it is at equal distance from previous prime (84578957803) and next prime (84578957807).

It is not a de Polignac number, because 84578957805 - 2¹ = 84578957803 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84578957803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422926 + ... + 589935.

It is an arithmetic number, because the mean of its divisors is an integer number (4466721420).

Almost surely, 2^84578957805 is an apocalyptic number.

It is an amenable number.

84578957805 is a deficient number, since it is larger than the sum of its proper divisors (58356127635).

84578957805 is a wasteful number, since it uses less digits than its factorization.

84578957805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013181.

The product of its (nonzero) digits is 112896000, while the sum is 66.

The spelling of 84578957805 in words is "eighty-four billion, five hundred seventy-eight million, nine hundred fifty-seven thousand, eight hundred five".