40181201280 has 512 divisors, whose sum is σ = 156480076800. Its totient is φ = 9663528960.

The previous prime is 40181201239. The next prime is 40181201327. The reversal of 40181201280 is 8210218104.

40181201280 is a `hidden beast` number, since 4 + 0 + 181 + 201 + 280 = 666.

40181201280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40181201280² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26040189 + ... + 26041731.

It is an arithmetic number, because the mean of its divisors is an integer number (305625150).

Almost surely, 2^40181201280 is an apocalyptic number.

40181201280 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 40181201280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78240038400).

40181201280 is an abundant number, since it is smaller than the sum of its proper divisors (116298875520).

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

40181201280 is a wasteful number, since it uses less digits than its factorization.

40181201280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

Adding to 40181201280 its reverse (8210218104), we get a palindrome (48391419384).

The spelling of 40181201280 in words is "forty billion, one hundred eighty-one million, two hundred one thousand, two hundred eighty".