42661253143 has 4 divisors (see below), whose sum is σ = 45170738640. Its totient is φ = 40151767648.

The previous prime is 42661253137. The next prime is 42661253149. The reversal of 42661253143 is 34135216624.

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

It is an interprime number because it is at equal distance from previous prime (42661253137) and next prime (42661253149).

It is a cyclic number.

It is not a de Polignac number, because 42661253143 - 2⁹ = 42661252631 is a prime.

It is a super-2 number, since 2×42661253143² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42661253149) 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 3 ways as a sum of consecutive naturals, for example, 1254742723 + ... + 1254742756.

It is an arithmetic number, because the mean of its divisors is an integer number (11292684660).

Almost surely, 2^42661253143 is an apocalyptic number.

42661253143 is a deficient number, since it is larger than the sum of its proper divisors (2509485497).

42661253143 is a wasteful number, since it uses less digits than its factorization.

42661253143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509485496.

The product of its digits is 103680, while the sum is 37.

Adding to 42661253143 its reverse (34135216624), we get a palindrome (76796469767).

The spelling of 42661253143 in words is "forty-two billion, six hundred sixty-one million, two hundred fifty-three thousand, one hundred forty-three".