42655340155 has 4 divisors (see below), whose sum is σ = 51186408192. Its totient is φ = 34124272120.

The previous prime is 42655340141. The next prime is 42655340159. The reversal of 42655340155 is 55104355624.

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

It is not a de Polignac number, because 42655340155 - 2¹³ = 42655331963 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42655340159) 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, 4265534011 + ... + 4265534020.

It is an arithmetic number, because the mean of its divisors is an integer number (12796602048).

Almost surely, 2^42655340155 is an apocalyptic number.

42655340155 is a deficient number, since it is larger than the sum of its proper divisors (8531068037).

42655340155 is an equidigital number, since it uses as much as digits as its factorization.

42655340155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8531068036.

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 42655340155 its reverse (55104355624), we get a palindrome (97759695779).

The spelling of 42655340155 in words is "forty-two billion, six hundred fifty-five million, three hundred forty thousand, one hundred fifty-five".