981221180192 has 54 divisors (see below), whose sum is σ = 2123494000299. Its totient is φ = 445981609920.

The previous prime is 981221180153. The next prime is 981221180231. The reversal of 981221180192 is 291081122189.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (981221180153) and next prime (981221180231).

It can be written as a sum of positive squares in only one way, i.e., 490610590096 + 490610590096 = 700436^2 + 700436^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=700436.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 61630409 + ... + 61646327.

Almost surely, 2^981221180192 is an apocalyptic number.

It is an amenable number.

981221180192 is an abundant number, since it is smaller than the sum of its proper divisors (1142272820107).

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

981221180192 is an frugal number, since it uses more digits than its factorization.

981221180192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31870 (or 15932 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 44.

The spelling of 981221180192 in words is "nine hundred eighty-one billion, two hundred twenty-one million, one hundred eighty thousand, one hundred ninety-two".