42878558134766 has 4 divisors (see below), whose sum is σ = 64317837202152. Its totient is φ = 21439279067382.

The previous prime is 42878558134729. The next prime is 42878558134931. The reversal of 42878558134766 is 66743185587824.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 42878558134693 and 42878558134702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10719639533690 + ... + 10719639533693.

It is an arithmetic number, because the mean of its divisors is an integer number (16079459300538).

Almost surely, 2^{42878558134766} is an apocalyptic number.

42878558134766 is a deficient number, since it is larger than the sum of its proper divisors (21439279067386).

42878558134766 is a wasteful number, since it uses less digits than its factorization.

42878558134766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21439279067385.

The product of its digits is 2167603200, while the sum is 74.

The spelling of 42878558134766 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred fifty-eight million, one hundred thirty-four thousand, seven hundred sixty-six".