40445501639 has 8 divisors (see below), whose sum is σ = 40510761648. Its totient is φ = 40380278400.

The previous prime is 40445501497. The next prime is 40445501653. The reversal of 40445501639 is 93610554404.

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 40445501639 - 2²⁴ = 40428724423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40445501596 and 40445501605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40445501689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2902589 + ... + 2916489.

It is an arithmetic number, because the mean of its divisors is an integer number (5063845206).

Almost surely, 2^40445501639 is an apocalyptic number.

40445501639 is a deficient number, since it is larger than the sum of its proper divisors (65260009).

40445501639 is a wasteful number, since it uses less digits than its factorization.

40445501639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18385.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 40445501639 in words is "forty billion, four hundred forty-five million, five hundred one thousand, six hundred thirty-nine".