4001155040 has 48 divisors (see below), whose sum is σ = 9477554688. Its totient is φ = 1596258816.

The previous prime is 4001155019. The next prime is 4001155043. The reversal of 4001155040 is 405511004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001155043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28634 + ... + 93926.

It is an arithmetic number, because the mean of its divisors is an integer number (197449056).

Almost surely, 2^4001155040 is an apocalyptic number.

4001155040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4001155040 is an abundant number, since it is smaller than the sum of its proper divisors (5476399648).

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

4001155040 is a wasteful number, since it uses less digits than its factorization.

4001155040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65691 (or 65683 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 4001155040 is about 63254.6839372390. The cubic root of 4001155040 is about 1587.5538299063.

Adding to 4001155040 its reverse (405511004), we get a palindrome (4406666044).

The spelling of 4001155040 in words is "four billion, one million, one hundred fifty-five thousand, forty".