40581853438 has 32 divisors (see below), whose sum is σ = 70638289920. Its totient is φ = 17126834400.

The previous prime is 40581853427. The next prime is 40581853439. The reversal of 40581853438 is 83435818504.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40581853391 and 40581853400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40581853439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167163 + ... + 330313.

It is an arithmetic number, because the mean of its divisors is an integer number (2207446560).

Almost surely, 2^40581853438 is an apocalyptic number.

40581853438 is a deficient number, since it is larger than the sum of its proper divisors (30056436482).

40581853438 is a wasteful number, since it uses less digits than its factorization.

40581853438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163432.

The product of its (nonzero) digits is 1843200, while the sum is 49.

The spelling of 40581853438 in words is "forty billion, five hundred eighty-one million, eight hundred fifty-three thousand, four hundred thirty-eight".