84961081812 has 12 divisors (see below), whose sum is σ = 198242524256. Its totient is φ = 28320360600.

The previous prime is 84961081763. The next prime is 84961081823. The reversal of 84961081812 is 21818016948.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×84961081812³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3540045064 + ... + 3540045087.

Almost surely, 2^84961081812 is an apocalyptic number.

It is an amenable number.

84961081812 is an abundant number, since it is smaller than the sum of its proper divisors (113281442444).

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

84961081812 is a wasteful number, since it uses less digits than its factorization.

84961081812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7080090158 (or 7080090156 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 48.

The spelling of 84961081812 in words is "eighty-four billion, nine hundred sixty-one million, eighty-one thousand, eight hundred twelve".