42878558134887 has 16 divisors (see below), whose sum is σ = 57435168960000. Its totient is φ = 28453928647424.

The previous prime is 42878558134729. The next prime is 42878558134931. The reversal of 42878558134887 is 78843185587824.

It is a cyclic number.

It is not a de Polignac number, because 42878558134887 - 2⁸ = 42878558134631 is a prime.

It is a Smith number, since the sum of its digits (78) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878558134487) 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, 11106762 + ... + 14460887.

It is an arithmetic number, because the mean of its divisors is an integer number (3589698060000).

Almost surely, 2^{42878558134887} is an apocalyptic number.

42878558134887 is a deficient number, since it is larger than the sum of its proper divisors (14556610825113).

42878558134887 is a wasteful number, since it uses less digits than its factorization.

42878558134887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25570230.

The product of its digits is 3853516800, while the sum is 78.

The spelling of 42878558134887 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred fifty-eight million, one hundred thirty-four thousand, eight hundred eighty-seven".