84855814987 has 4 divisors (see below), whose sum is σ = 84869370000. Its totient is φ = 84842259976.

The previous prime is 84855814973. The next prime is 84855815047. The reversal of 84855814987 is 78941855848.

It is a happy number.

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 84855814987 - 2²³ = 84847426379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84855814187) 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, 6768112 + ... + 6780637.

It is an arithmetic number, because the mean of its divisors is an integer number (21217342500).

Almost surely, 2^84855814987 is an apocalyptic number.

84855814987 is a deficient number, since it is larger than the sum of its proper divisors (13555013).

84855814987 is a wasteful number, since it uses less digits than its factorization.

84855814987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13555012.

The product of its digits is 103219200, while the sum is 67.

The spelling of 84855814987 in words is "eighty-four billion, eight hundred fifty-five million, eight hundred fourteen thousand, nine hundred eighty-seven".