84433981554 has 160 divisors (see below), whose sum is σ = 214889727360. Its totient is φ = 24564384000.

The previous prime is 84433981543. The next prime is 84433981561. The reversal of 84433981554 is 45518933448.

It is a happy number.

84433981554 is a `hidden beast` number, since 8 + 4 + 4 + 3 + 3 + 9 + 81 + 554 = 666.

It is a super-2 number, since 2×84433981554² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84433981554.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24046659 + ... + 24050169.

It is an arithmetic number, because the mean of its divisors is an integer number (1343060796).

Almost surely, 2^84433981554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84433981554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107444863680).

84433981554 is an abundant number, since it is smaller than the sum of its proper divisors (130455745806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84433981554 is a wasteful number, since it uses less digits than its factorization.

84433981554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158 (or 4149 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 84433981554 in words is "eighty-four billion, four hundred thirty-three million, nine hundred eighty-one thousand, five hundred fifty-four".