45404431639 has 16 divisors (see below), whose sum is σ = 53665689600. Its totient is φ = 37607865984.

The previous prime is 45404431603. The next prime is 45404431649. The reversal of 45404431639 is 93613440454.

It is a cyclic number.

It is not a de Polignac number, because 45404431639 - 2²⁵ = 45370877207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45404431595 and 45404431604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45404431649) 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, 847474 + ... + 899455.

It is an arithmetic number, because the mean of its divisors is an integer number (3354105600).

Almost surely, 2^45404431639 is an apocalyptic number.

45404431639 is a deficient number, since it is larger than the sum of its proper divisors (8261257961).

45404431639 is a wasteful number, since it uses less digits than its factorization.

45404431639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747062.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 45404431639 in words is "forty-five billion, four hundred four million, four hundred thirty-one thousand, six hundred thirty-nine".