42726224778 has 16 divisors (see below), whose sum is σ = 85454528256. Its totient is φ = 14241728480.

The previous prime is 42726224771. The next prime is 42726224791. The reversal of 42726224778 is 87742262724.

It is a super-2 number, since 2×42726224778² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42726224778.

It is not an unprimeable number, because it can be changed into a prime (42726224771) 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, 349558 + ... + 455678.

It is an arithmetic number, because the mean of its divisors is an integer number (5340908016).

Almost surely, 2^42726224778 is an apocalyptic number.

42726224778 is an abundant number, since it is smaller than the sum of its proper divisors (42728303478).

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

42726224778 is a wasteful number, since it uses less digits than its factorization.

42726224778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173229.

The product of its digits is 4214784, while the sum is 51.

The spelling of 42726224778 in words is "forty-two billion, seven hundred twenty-six million, two hundred twenty-four thousand, seven hundred seventy-eight".