40851569920 has 144 divisors (see below), whose sum is σ = 113248719360. Its totient is φ = 13828718592.

The previous prime is 40851569903. The next prime is 40851569923. The reversal of 40851569920 is 2996515804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40851569923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678984 + ... + 736696.

It is an arithmetic number, because the mean of its divisors is an integer number (786449440).

Almost surely, 2^40851569920 is an apocalyptic number.

40851569920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40851569920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56624359680).

40851569920 is an abundant number, since it is smaller than the sum of its proper divisors (72397149440).

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

40851569920 is an equidigital number, since it uses as much as digits as its factorization.

40851569920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57820 (or 57806 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 40851569920 in words is "forty billion, eight hundred fifty-one million, five hundred sixty-nine thousand, nine hundred twenty".