40820173780 has 96 divisors (see below), whose sum is σ = 89008077312. Its totient is φ = 15712819200.

The previous prime is 40820173759. The next prime is 40820173789. The reversal of 40820173780 is 8737102804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40820173789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41780652 + ... + 41781628.

It is an arithmetic number, because the mean of its divisors is an integer number (927167472).

Almost surely, 2^40820173780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40820173780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44504038656).

40820173780 is an abundant number, since it is smaller than the sum of its proper divisors (48187903532).

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

40820173780 is a wasteful number, since it uses less digits than its factorization.

40820173780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 40820173780 in words is "forty billion, eight hundred twenty million, one hundred seventy-three thousand, seven hundred eighty".