5611998281 has 4 divisors (see below), whose sum is σ = 5614042500. Its totient is φ = 5609954064.

The previous prime is 5611998277. The next prime is 5611998283. The reversal of 5611998281 is 1828991165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 630461881 + 4981536400 = 25109^2 + 70580^2 .

It is a cyclic number.

It is not a de Polignac number, because 5611998281 - 2² = 5611998277 is a prime.

It is a super-2 number, since 2×5611998281² = 62989049411893909922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5611998283) 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, 1017986 + ... + 1023483.

It is an arithmetic number, because the mean of its divisors is an integer number (1403510625).

Almost surely, 2^5611998281 is an apocalyptic number.

It is an amenable number.

5611998281 is a deficient number, since it is larger than the sum of its proper divisors (2044219).

5611998281 is a wasteful number, since it uses less digits than its factorization.

5611998281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044218.

The product of its digits is 311040, while the sum is 50.

The square root of 5611998281 is about 74913.2717280456. The cubic root of 5611998281 is about 1777.0753513819.

The spelling of 5611998281 in words is "five billion, six hundred eleven million, nine hundred ninety-eight thousand, two hundred eighty-one".