42778214787 has 32 divisors (see below), whose sum is σ = 71133548544. Its totient is φ = 22215664800.

The previous prime is 42778214723. The next prime is 42778214821. The reversal of 42778214787 is 78741287724.

It is a happy number.

It is not a de Polignac number, because 42778214787 - 2⁶ = 42778214723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42778214387) 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 31 ways as a sum of consecutive naturals, for example, 779898 + ... + 832944.

It is an arithmetic number, because the mean of its divisors is an integer number (2222923392).

Almost surely, 2^42778214787 is an apocalyptic number.

42778214787 is a deficient number, since it is larger than the sum of its proper divisors (28355333757).

42778214787 is a wasteful number, since it uses less digits than its factorization.

42778214787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56559.

The product of its digits is 9834496, while the sum is 57.

The spelling of 42778214787 in words is "forty-two billion, seven hundred seventy-eight million, two hundred fourteen thousand, seven hundred eighty-seven".