42878535442646 has 32 divisors (see below), whose sum is σ = 66735728928000. Its totient is φ = 20640460982400.

The previous prime is 42878535442627. The next prime is 42878535442697. The reversal of 42878535442646 is 64624453587824.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137385980 + ... + 137697728.

It is an arithmetic number, because the mean of its divisors is an integer number (2085491529000).

Almost surely, 2^{42878535442646} is an apocalyptic number.

42878535442646 is a deficient number, since it is larger than the sum of its proper divisors (23857193485354).

42878535442646 is a wasteful number, since it uses less digits than its factorization.

42878535442646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323240.

The product of its digits is 1238630400, while the sum is 68.

The spelling of 42878535442646 in words is "forty-two trillion, eight hundred seventy-eight billion, five hundred thirty-five million, four hundred forty-two thousand, six hundred forty-six".