981117984196 has 81 divisors (see below), whose sum is σ = 2015708279949. Its totient is φ = 416633960736.

The previous prime is 981117984173. The next prime is 981117984227. The reversal of 981117984196 is 691489711189.

The square root of 981117984196 is 990514.

It is a perfect power (a square), and thus also a powerful number.

981117984196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 797831249796 + 183286734400 = 893214^2 + 428120^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1927539990 + ... + 1927540498.

Almost surely, 2^981117984196 is an apocalyptic number.

981117984196 is the 990514-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981117984196

981117984196 is an abundant number, since it is smaller than the sum of its proper divisors (1034590295753).

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

981117984196 is an equidigital number, since it uses as much as digits as its factorization.

981117984196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 657 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 64.

Multiplying 981117984196 by its sum of digits (64), we get a square (62791550988544 = 7924112²).

The spelling of 981117984196 in words is "nine hundred eighty-one billion, one hundred seventeen million, nine hundred eighty-four thousand, one hundred ninety-six".