40189981880 has 32 divisors (see below), whose sum is σ = 90805838400. Its totient is φ = 16008725376.

The previous prime is 40189981879. The next prime is 40189981883. The reversal of 40189981880 is 8818998104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40189981883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092427 + ... + 2111546.

It is an arithmetic number, because the mean of its divisors is an integer number (2837682450).

Almost surely, 2^40189981880 is an apocalyptic number.

40189981880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40189981880 is an abundant number, since it is smaller than the sum of its proper divisors (50615856520).

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

40189981880 is a wasteful number, since it uses less digits than its factorization.

40189981880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204223 (or 4204219 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 56.

The spelling of 40189981880 in words is "forty billion, one hundred eighty-nine million, nine hundred eighty-one thousand, eight hundred eighty".