40000001040 has 160 divisors (see below), whose sum is σ = 143768298240. Its totient is φ = 10202886144.

The previous prime is 40000001039. The next prime is 40000001051. The reversal of 40000001040 is 4010000004.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352897 + ... + 452256.

It is an arithmetic number, because the mean of its divisors is an integer number (898551864).

Almost surely, 2^40000001040 is an apocalyptic number.

40000001040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40000001040 is an abundant number, since it is smaller than the sum of its proper divisors (103768297200).

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

40000001040 is a wasteful number, since it uses less digits than its factorization.

40000001040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805198 (or 805186 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 40000001040 its reverse (4010000004), we get a palindrome (44010001044).

The spelling of 40000001040 in words is "forty billion, one thousand, forty".