42040161834251 has 16 divisors (see below), whose sum is σ = 48655021977600. Its totient is φ = 35577600128928.

The previous prime is 42040161834239. The next prime is 42040161834259. The reversal of 42040161834251 is 15243816104024.

It is a happy number.

42040161834251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42040161834251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42040161834199 and 42040161834208.

It is not an unprimeable number, because it can be changed into a prime (42040161834259) 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 15 ways as a sum of consecutive naturals, for example, 28766846 + ... + 30192908.

It is an arithmetic number, because the mean of its divisors is an integer number (3040938873600).

Almost surely, 2^{42040161834251} is an apocalyptic number.

42040161834251 is a deficient number, since it is larger than the sum of its proper divisors (6614860143349).

42040161834251 is a wasteful number, since it uses less digits than its factorization.

42040161834251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479458.

The product of its (nonzero) digits is 184320, while the sum is 41.

Adding to 42040161834251 its reverse (15243816104024), we get a palindrome (57283977938275).

The spelling of 42040161834251 in words is "forty-two trillion, forty billion, one hundred sixty-one million, eight hundred thirty-four thousand, two hundred fifty-one".