61121164530 has 16 divisors (see below), whose sum is σ = 146690794944. Its totient is φ = 16298977200.

The previous prime is 61121164513. The next prime is 61121164537. The reversal of 61121164530 is 3546112116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2037372151 = 61121164530 / (6 + 1 + 1 + 2 + 1 + 1 + 6 + 4 + 5 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (61121164537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018686046 + ... + 1018686105.

It is an arithmetic number, because the mean of its divisors is an integer number (9168174684).

Almost surely, 2^61121164530 is an apocalyptic number.

61121164530 is an abundant number, since it is smaller than the sum of its proper divisors (85569630414).

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

61121164530 is a wasteful number, since it uses less digits than its factorization.

61121164530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037372161.

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

Adding to 61121164530 its reverse (3546112116), we get a palindrome (64667276646).

The spelling of 61121164530 in words is "sixty-one billion, one hundred twenty-one million, one hundred sixty-four thousand, five hundred thirty".