42778187826 has 32 divisors (see below), whose sum is σ = 93873757248. Its totient is φ = 12888152640.

The previous prime is 42778187791. The next prime is 42778187827. The reversal of 42778187826 is 62878187724.

It is a self number, because there is not a number n which added to its sum of digits gives 42778187826.

It is not an unprimeable number, because it can be changed into a prime (42778187827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1861861 + ... + 1884696.

It is an arithmetic number, because the mean of its divisors is an integer number (2933554914).

Almost surely, 2^42778187826 is an apocalyptic number.

42778187826 is an abundant number, since it is smaller than the sum of its proper divisors (51095569422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42778187826 is a wasteful number, since it uses less digits than its factorization.

42778187826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746746.

The product of its digits is 16859136, while the sum is 60.

The spelling of 42778187826 in words is "forty-two billion, seven hundred seventy-eight million, one hundred eighty-seven thousand, eight hundred twenty-six".