40040040442 has 4 divisors (see below), whose sum is σ = 60060060666. Its totient is φ = 20020020220.

The previous prime is 40040040437. The next prime is 40040040461. The reversal of 40040040442 is 24404004004.

40040040442 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., 22895018721 + 17145021721 = 151311^2 + 130939^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010010109 + ... + 10010010112.

Almost surely, 2^40040040442 is an apocalyptic number.

40040040442 is a deficient number, since it is larger than the sum of its proper divisors (20020020224).

40040040442 is a wasteful number, since it uses less digits than its factorization.

40040040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020020223.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 40040040442 its reverse (24404004004), we get a palindrome (64444044446).

The spelling of 40040040442 in words is "forty billion, forty million, forty thousand, four hundred forty-two".