61121322733 has 4 divisors (see below), whose sum is σ = 61126204348. Its totient is φ = 61116441120.

The previous prime is 61121322709. The next prime is 61121322739. The reversal of 61121322733 is 33722312116.

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 48617163049 + 12504159684 = 220493^2 + 111822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61121322733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61121322695 and 61121322704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61121322739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2421978 + ... + 2447083.

It is an arithmetic number, because the mean of its divisors is an integer number (15281551087).

Almost surely, 2^61121322733 is an apocalyptic number.

It is an amenable number.

61121322733 is a deficient number, since it is larger than the sum of its proper divisors (4881615).

61121322733 is a wasteful number, since it uses less digits than its factorization.

61121322733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881614.

The product of its digits is 9072, while the sum is 31.

Adding to 61121322733 its reverse (33722312116), we get a palindrome (94843634849).

The spelling of 61121322733 in words is "sixty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, seven hundred thirty-three".