40644645533 has 8 divisors (see below), whose sum is σ = 41370286080. Its totient is φ = 39925342800.

The previous prime is 40644645499. The next prime is 40644645539. The reversal of 40644645533 is 33554644604.

40644645533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40644645533 - 2⁶ = 40644645469 is a prime.

It is a super-3 number, since 3×40644645533³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644645539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571513 + ... + 1597166.

It is an arithmetic number, because the mean of its divisors is an integer number (5171285760).

Almost surely, 2^40644645533 is an apocalyptic number.

It is an amenable number.

40644645533 is a deficient number, since it is larger than the sum of its proper divisors (725640547).

40644645533 is a wasteful number, since it uses less digits than its factorization.

40644645533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168907.

The product of its (nonzero) digits is 2073600, while the sum is 44.

The spelling of 40644645533 in words is "forty billion, six hundred forty-four million, six hundred forty-five thousand, five hundred thirty-three".