42878556271361 has 16 divisors (see below), whose sum is σ = 44395443368640. Its totient is φ = 41364236464320.

The previous prime is 42878556271351. The next prime is 42878556271409. The reversal of 42878556271361 is 16317265587824.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42878556271361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42878556271351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191061626 + ... + 191285916.

It is an arithmetic number, because the mean of its divisors is an integer number (2774715210540).

Almost surely, 2^{42878556271361} is an apocalyptic number.

It is an amenable number.

42878556271361 is a deficient number, since it is larger than the sum of its proper divisors (1516887097279).

42878556271361 is a wasteful number, since it uses less digits than its factorization.

42878556271361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229984.

The product of its digits is 135475200, while the sum is 65.

The spelling of 42878556271361 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred fifty-six million, two hundred seventy-one thousand, three hundred sixty-one".