40003917645 has 32 divisors (see below), whose sum is σ = 64392413184. Its totient is φ = 21206888000.

The previous prime is 40003917643. The next prime is 40003917661. The reversal of 40003917645 is 54671930004.

40003917645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40003917645 - 2¹ = 40003917643 is a prime.

It is a super-3 number, since 3×40003917645³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40003917643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4152304 + ... + 4161926.

It is an arithmetic number, because the mean of its divisors is an integer number (2012262912).

Almost surely, 2^40003917645 is an apocalyptic number.

It is an amenable number.

40003917645 is a deficient number, since it is larger than the sum of its proper divisors (24388495539).

40003917645 is a wasteful number, since it uses less digits than its factorization.

40003917645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11273.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 40003917645 in words is "forty billion, three million, nine hundred seventeen thousand, six hundred forty-five".