42878766320555 has 16 divisors (see below), whose sum is σ = 56922797599488. Its totient is φ = 30745338204000.

The previous prime is 42878766320543. The next prime is 42878766320561. The reversal of 42878766320555 is 55502366787824.

It is not a de Polignac number, because 42878766320555 - 2¹² = 42878766316459 is a prime.

It is a Duffinian 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 in 15 ways as a sum of consecutive naturals, for example, 5490235061 + ... + 5490242870.

It is an arithmetic number, because the mean of its divisors is an integer number (3557674849968).

Almost surely, 2^{42878766320555} is an apocalyptic number.

42878766320555 is a deficient number, since it is larger than the sum of its proper divisors (14044031278933).

42878766320555 is a wasteful number, since it uses less digits than its factorization.

42878766320555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980478018.

The product of its (nonzero) digits is 677376000, while the sum is 68.

The spelling of 42878766320555 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred sixty-six million, three hundred twenty thousand, five hundred fifty-five".