40644334205401 has 16 divisors (see below), whose sum is σ = 43365226132800. Its totient is φ = 37960135050240.

The previous prime is 40644334205399. The next prime is 40644334205417. The reversal of 40644334205401 is 10450243344604.

It is a cyclic number.

It is not a de Polignac number, because 40644334205401 - 2¹ = 40644334205399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40644334245401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65581825 + ... + 66198673.

It is an arithmetic number, because the mean of its divisors is an integer number (2710326633300).

Almost surely, 2^{40644334205401} is an apocalyptic number.

It is an amenable number.

40644334205401 is a deficient number, since it is larger than the sum of its proper divisors (2720891927399).

40644334205401 is a wasteful number, since it uses less digits than its factorization.

40644334205401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646584.

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 40644334205401 in words is "forty trillion, six hundred forty-four billion, three hundred thirty-four million, two hundred five thousand, four hundred one".