42156655243 has 4 divisors (see below), whose sum is σ = 43610333040. Its totient is φ = 40702977448.

The previous prime is 42156655241. The next prime is 42156655253. The reversal of 42156655243 is 34255665124.

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 42156655243 - 2¹ = 42156655241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42156655243.

It is not an unprimeable number, because it can be changed into a prime (42156655241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726838855 + ... + 726838912.

It is an arithmetic number, because the mean of its divisors is an integer number (10902583260).

Almost surely, 2^42156655243 is an apocalyptic number.

42156655243 is a deficient number, since it is larger than the sum of its proper divisors (1453677797).

42156655243 is a wasteful number, since it uses less digits than its factorization.

42156655243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453677796.

The product of its digits is 864000, while the sum is 43.

The spelling of 42156655243 in words is "forty-two billion, one hundred fifty-six million, six hundred fifty-five thousand, two hundred forty-three".