61142335243 has 8 divisors (see below), whose sum is σ = 66703109616. Its totient is φ = 55581957600.

The previous prime is 61142335187. The next prime is 61142335249. The reversal of 61142335243 is 34253324116.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61142335243 - 2¹⁷ = 61142204171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61142335199 and 61142335208.

It is not an unprimeable number, because it can be changed into a prime (61142335249) 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 7 ways as a sum of consecutive naturals, for example, 289213 + ... + 453793.

It is an arithmetic number, because the mean of its divisors is an integer number (8337888702).

Almost surely, 2^61142335243 is an apocalyptic number.

61142335243 is a deficient number, since it is larger than the sum of its proper divisors (5560774373).

61142335243 is a wasteful number, since it uses less digits than its factorization.

61142335243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198365.

The product of its digits is 51840, while the sum is 34.

Adding to 61142335243 its reverse (34253324116), we get a palindrome (95395659359).

The spelling of 61142335243 in words is "sixty-one billion, one hundred forty-two million, three hundred thirty-five thousand, two hundred forty-three".