42644066826 has 16 divisors (see below), whose sum is σ = 88996313664. Its totient is φ = 13596658944.

The previous prime is 42644066821. The next prime is 42644066833. The reversal of 42644066826 is 62866044624.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42644066821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154507351 + ... + 154507626.

It is an arithmetic number, because the mean of its divisors is an integer number (5562269604).

Almost surely, 2^42644066826 is an apocalyptic number.

42644066826 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

42644066826 is an abundant number, since it is smaller than the sum of its proper divisors (46352246838).

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

42644066826 is a wasteful number, since it uses less digits than its factorization.

42644066826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309015005.

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 42644066826 in words is "forty-two billion, six hundred forty-four million, sixty-six thousand, eight hundred twenty-six".