42181278987 has 8 divisors (see below), whose sum is σ = 57438337536. Its totient is φ = 27522536552.

The previous prime is 42181278977. The next prime is 42181279009. The reversal of 42181278987 is 78987218124.

It is a happy number.

42181278987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42181278987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42181278977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149578863 + ... + 149579144.

It is an arithmetic number, because the mean of its divisors is an integer number (7179792192).

Almost surely, 2^42181278987 is an apocalyptic number.

42181278987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42181278987 is a deficient number, since it is larger than the sum of its proper divisors (15257058549).

42181278987 is a wasteful number, since it uses less digits than its factorization.

42181278987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299158057.

The product of its digits is 3612672, while the sum is 57.

The spelling of 42181278987 in words is "forty-two billion, one hundred eighty-one million, two hundred seventy-eight thousand, nine hundred eighty-seven".