2197981986824 has 16 divisors (see below), whose sum is σ = 4438232858220. Its totient is φ = 1014453224640.

The previous prime is 2197981986821. The next prime is 2197981986841. The reversal of 2197981986824 is 4286891897912.

It can be written as a sum of positive squares in 2 ways, for example, as 1939529728900 + 258452257924 = 1392670^2 + 508382^2 .

It is a super-2 number, since 2×2197981986824² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2197981986821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10567220987 + ... + 10567221194.

Almost surely, 2^{2197981986824} is an apocalyptic number.

It is an amenable number.

2197981986824 is an abundant number, since it is smaller than the sum of its proper divisors (2240250871396).

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

2197981986824 is a wasteful number, since it uses less digits than its factorization.

2197981986824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21134442200 (or 21134442196 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 74.

The spelling of 2197981986824 in words is "two trillion, one hundred ninety-seven billion, nine hundred eighty-one million, nine hundred eighty-six thousand, eight hundred twenty-four".