42878537147161 has 8 divisors (see below), whose sum is σ = 43328199277160. Its totient is φ = 42429030432768.

The previous prime is 42878537147143. The next prime is 42878537147177. The reversal of 42878537147161 is 16174173587824.

It can be written as a sum of positive squares in 4 ways, for example, as 19566635649561 + 23311901497600 = 4423419^2 + 4828240^2 .

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 42878537147161 - 2¹⁵ = 42878537114393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42878537147093 and 42878537147102.

It is not an unprimeable number, because it can be changed into a prime (42878537147261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38299176 + ... + 39402841.

It is an arithmetic number, because the mean of its divisors is an integer number (5416024909645).

Almost surely, 2^{42878537147161} is an apocalyptic number.

It is an amenable number.

42878537147161 is a deficient number, since it is larger than the sum of its proper divisors (449662129999).

42878537147161 is an equidigital number, since it uses as much as digits as its factorization.

42878537147161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77707803.

The product of its digits is 63221760, while the sum is 64.

The spelling of 42878537147161 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred thirty-seven million, one hundred forty-seven thousand, one hundred sixty-one".