42856056249551 has 4 divisors (see below), whose sum is σ = 43767887233632. Its totient is φ = 41944225265472.

The previous prime is 42856056249521. The next prime is 42856056249577. The reversal of 42856056249551 is 15594265065824.

42856056249551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42856056249551 - 2³⁴ = 42838876380367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42856056249521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455915491970 + ... + 455915492063.

It is an arithmetic number, because the mean of its divisors is an integer number (10941971808408).

Almost surely, 2^{42856056249551} is an apocalyptic number.

42856056249551 is a deficient number, since it is larger than the sum of its proper divisors (911830984081).

42856056249551 is an equidigital number, since it uses as much as digits as its factorization.

42856056249551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911830984080.

The product of its (nonzero) digits is 103680000, while the sum is 62.

The spelling of 42856056249551 in words is "forty-two trillion, eight hundred fifty-six billion, fifty-six million, two hundred forty-nine thousand, five hundred fifty-one".