42878787281045 has 16 divisors (see below), whose sum is σ = 51503438297088. Its totient is φ = 34270436542080.

The previous prime is 42878787281041. The next prime is 42878787281051. The reversal of 42878787281045 is 54018278787824.

It is a happy number.

It is not a de Polignac number, because 42878787281045 - 2² = 42878787281041 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 42878787281045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878787281041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156772760 + ... + 157046030.

It is an arithmetic number, because the mean of its divisors is an integer number (3218964893568).

Almost surely, 2^{42878787281045} is an apocalyptic number.

It is an amenable number.

42878787281045 is a deficient number, since it is larger than the sum of its proper divisors (8624651016043).

42878787281045 is a wasteful number, since it uses less digits than its factorization.

42878787281045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302980.

The product of its (nonzero) digits is 449576960, while the sum is 71.

The spelling of 42878787281045 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred eighty-seven million, two hundred eighty-one thousand, forty-five".