40444399994 has 4 divisors (see below), whose sum is σ = 60666599994. Its totient is φ = 20222199996.

The previous prime is 40444399981. The next prime is 40444399997. The reversal of 40444399994 is 49999344404.

40444399994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32350698769 + 8093701225 = 179863^2 + 89965^2 .

It is not an unprimeable number, because it can be changed into a prime (40444399997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111099997 + ... + 10111100000.

Almost surely, 2^40444399994 is an apocalyptic number.

40444399994 is a deficient number, since it is larger than the sum of its proper divisors (20222200000).

40444399994 is a wasteful number, since it uses less digits than its factorization.

40444399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20222199999.

The product of its (nonzero) digits is 20155392, while the sum is 59.

The spelling of 40444399994 in words is "forty billion, four hundred forty-four million, three hundred ninety-nine thousand, nine hundred ninety-four".