40044686842 has 8 divisors (see below), whose sum is σ = 60889866516. Its totient is φ = 19748064672.

The previous prime is 40044686833. The next prime is 40044686867. The reversal of 40044686842 is 24868644004.

It can be written as a sum of positive squares in 2 ways, for example, as 36783020521 + 3261666321 = 191789^2 + 57111^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 40044686792 and 40044686801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137139193 + ... + 137139484.

Almost surely, 2^40044686842 is an apocalyptic number.

40044686842 is a deficient number, since it is larger than the sum of its proper divisors (20845179674).

40044686842 is a wasteful number, since it uses less digits than its factorization.

40044686842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274278752.

The product of its (nonzero) digits is 1179648, while the sum is 46.

The spelling of 40044686842 in words is "forty billion, forty-four million, six hundred eighty-six thousand, eight hundred forty-two".