40891384338 has 64 divisors (see below), whose sum is σ = 95648256000. Its totient is φ = 11411482752.

The previous prime is 40891384297. The next prime is 40891384351. The reversal of 40891384338 is 83348319804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 964270 + ... + 1005782.

It is an arithmetic number, because the mean of its divisors is an integer number (1494504000).

Almost surely, 2^40891384338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40891384338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47824128000).

40891384338 is an abundant number, since it is smaller than the sum of its proper divisors (54756871662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40891384338 is a wasteful number, since it uses less digits than its factorization.

40891384338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42071.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 40891384338 in words is "forty billion, eight hundred ninety-one million, three hundred eighty-four thousand, three hundred thirty-eight".