40040010001 has 4 divisors (see below), whose sum is σ = 40040464932. Its totient is φ = 40039555072.

The previous prime is 40040009957. The next prime is 40040010041. The reversal of 40040010001 is 10001004004.

It is a Cunningham number, because it is equal to 200100²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 38760159376 + 1279850625 = 196876^2 + 35775^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040010001 - 2¹⁵ = 40039977233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40040010001.

It is not an unprimeable number, because it can be changed into a prime (40040010041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48520 + ... + 287113.

It is an arithmetic number, because the mean of its divisors is an integer number (10010116233).

Almost surely, 2^40040010001 is an apocalyptic number.

It is an amenable number.

40040010001 is a deficient number, since it is larger than the sum of its proper divisors (454931).

40040010001 is a wasteful number, since it uses less digits than its factorization.

40040010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454930.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 40040010001 its reverse (10001004004), we get a palindrome (50041014005).

The spelling of 40040010001 in words is "forty billion, forty million, ten thousand, one".