84724564871 has 4 divisors (see below), whose sum is σ = 84750141552. Its totient is φ = 84698988192.

The previous prime is 84724564843. The next prime is 84724564877. The reversal of 84724564871 is 17846542748.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84724564871 - 2¹⁴ = 84724548487 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 (84724564877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12783371 + ... + 12789996.

It is an arithmetic number, because the mean of its divisors is an integer number (21187535388).

Almost surely, 2^84724564871 is an apocalyptic number.

84724564871 is a deficient number, since it is larger than the sum of its proper divisors (25576681).

84724564871 is a wasteful number, since it uses less digits than its factorization.

84724564871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25576680.

The product of its digits is 12042240, while the sum is 56.

The spelling of 84724564871 in words is "eighty-four billion, seven hundred twenty-four million, five hundred sixty-four thousand, eight hundred seventy-one".