84571443840 has 128 divisors (see below), whose sum is σ = 290307830400. Its totient is φ = 20817580032.

The previous prime is 84571443839. The next prime is 84571443857. The reversal of 84571443840 is 4834417548.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×84571443840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 84571443840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669180 + ... + 1719099.

It is an arithmetic number, because the mean of its divisors is an integer number (2268029925).

Almost surely, 2^84571443840 is an apocalyptic number.

84571443840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84571443840 is an abundant number, since it is smaller than the sum of its proper divisors (205736386560).

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

84571443840 is a wasteful number, since it uses less digits than its factorization.

84571443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388314 (or 3388302 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 84571443840 in words is "eighty-four billion, five hundred seventy-one million, four hundred forty-three thousand, eight hundred forty".