84718172851 has 8 divisors (see below), whose sum is σ = 91598444784. Its totient is φ = 77889828000.

The previous prime is 84718172849. The next prime is 84718172863. The reversal of 84718172851 is 15827181748.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84718172851 - 2¹ = 84718172849 is a prime.

It is a super-2 number, since 2×84718172851² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84718172831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12978376 + ... + 12984901.

It is an arithmetic number, because the mean of its divisors is an integer number (11449805598).

Almost surely, 2^84718172851 is an apocalyptic number.

84718172851 is a deficient number, since it is larger than the sum of its proper divisors (6880271933).

84718172851 is a wasteful number, since it uses less digits than its factorization.

84718172851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25963541.

The product of its digits is 1003520, while the sum is 52.

The spelling of 84718172851 in words is "eighty-four billion, seven hundred eighteen million, one hundred seventy-two thousand, eight hundred fifty-one".