5661121134 has 16 divisors (see below), whose sum is σ = 11328329088. Its totient is φ = 1886025912.

The previous prime is 5661121133. The next prime is 5661121153. The reversal of 5661121134 is 4311211665.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661121133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241482 + ... + 263885.

It is an arithmetic number, because the mean of its divisors is an integer number (708020568).

Almost surely, 2^5661121134 is an apocalyptic number.

5661121134 is an abundant number, since it is smaller than the sum of its proper divisors (5667207954).

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

5661121134 is a wasteful number, since it uses less digits than its factorization.

5661121134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507239.

The product of its digits is 4320, while the sum is 30.

The square root of 5661121134 is about 75240.4222077468. The cubic root of 5661121134 is about 1782.2453184899.

Adding to 5661121134 its reverse (4311211665), we get a palindrome (9972332799).

The spelling of 5661121134 in words is "five billion, six hundred sixty-one million, one hundred twenty-one thousand, one hundred thirty-four".