40820816780 has 12 divisors (see below), whose sum is σ = 85723715280. Its totient is φ = 16328326704.

The previous prime is 40820816749. The next prime is 40820816797. The reversal of 40820816780 is 8761802804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020520400 + ... + 1020520439.

It is an arithmetic number, because the mean of its divisors is an integer number (7143642940).

Almost surely, 2^40820816780 is an apocalyptic number.

It is an amenable number.

40820816780 is an abundant number, since it is smaller than the sum of its proper divisors (44902898500).

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

40820816780 is a wasteful number, since it uses less digits than its factorization.

40820816780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041040848 (or 2041040846 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 40820816780 in words is "forty billion, eight hundred twenty million, eight hundred sixteen thousand, seven hundred eighty".