42001181144849 has 2 divisors, whose sum is σ = 42001181144850. Its totient is φ = 42001181144848.

The previous prime is 42001181144827. The next prime is 42001181144899. The reversal of 42001181144849 is 94844118110024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24013675140625 + 17987506004224 = 4900375^2 + 4241168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42001181144849 is a prime.

It is not a weakly prime, because it can be changed into another prime (42001181144899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000590572424 + 21000590572425.

It is an arithmetic number, because the mean of its divisors is an integer number (21000590572425).

Almost surely, 2^{42001181144849} is an apocalyptic number.

It is an amenable number.

42001181144849 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001181144849 is an equidigital number, since it uses as much as digits as its factorization.

42001181144849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 42001181144849 in words is "forty-two trillion, one billion, one hundred eighty-one million, one hundred forty-four thousand, eight hundred forty-nine".