84919891847 has 8 divisors (see below), whose sum is σ = 97053081600. Its totient is φ = 72787146264.

The previous prime is 84919891783. The next prime is 84919891879. The reversal of 84919891847 is 74819891948.

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

It is not a de Polignac number, because 84919891847 - 2⁶ = 84919891783 is a prime.

It is a super-2 number, since 2×84919891847² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84919801847) 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, 616154 + ... + 741272.

It is an arithmetic number, because the mean of its divisors is an integer number (12131635200).

Almost surely, 2^84919891847 is an apocalyptic number.

84919891847 is a deficient number, since it is larger than the sum of its proper divisors (12133189753).

84919891847 is a wasteful number, since it uses less digits than its factorization.

84919891847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222085.

The product of its digits is 41803776, while the sum is 68.

The spelling of 84919891847 in words is "eighty-four billion, nine hundred nineteen million, eight hundred ninety-one thousand, eight hundred forty-seven".