40440042401 has 4 divisors (see below), whose sum is σ = 44116409904. Its totient is φ = 36763674900.

The previous prime is 40440042397. The next prime is 40440042421. The reversal of 40440042401 is 10424004404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40440042401 - 2² = 40440042397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40440042421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1838183735 + ... + 1838183756.

It is an arithmetic number, because the mean of its divisors is an integer number (11029102476).

Almost surely, 2^40440042401 is an apocalyptic number.

It is an amenable number.

40440042401 is a deficient number, since it is larger than the sum of its proper divisors (3676367503).

40440042401 is a wasteful number, since it uses less digits than its factorization.

40440042401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676367502.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 40440042401 its reverse (10424004404), we get a palindrome (50864046805).

The spelling of 40440042401 in words is "forty billion, four hundred forty million, forty-two thousand, four hundred one".