42561047744141 has 4 divisors (see below), whose sum is σ = 45064638787932. Its totient is φ = 40057456700352.

The previous prime is 42561047744063. The next prime is 42561047744183. The reversal of 42561047744141 is 14144774016524.

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 38532075471241 + 4028972272900 = 6207421^2 + 2007230^2 .

It is a cyclic number.

It is not a de Polignac number, because 42561047744141 - 2³⁰ = 42559974002317 is a prime.

It is a super-2 number, since 2×42561047744141² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42561047744141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42561047749141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251795521870 + ... + 1251795521903.

It is an arithmetic number, because the mean of its divisors is an integer number (11266159696983).

Almost surely, 2^{42561047744141} is an apocalyptic number.

It is an amenable number.

42561047744141 is a deficient number, since it is larger than the sum of its proper divisors (2503591043791).

42561047744141 is a wasteful number, since it uses less digits than its factorization.

42561047744141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503591043790.

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 42561047744141 in words is "forty-two trillion, five hundred sixty-one billion, forty-seven million, seven hundred forty-four thousand, one hundred forty-one".