40040009999 has 16 divisors (see below), whose sum is σ = 43879104000. Its totient is φ = 36234480000.

The previous prime is 40040009957. The next prime is 40040010041. The reversal of 40040009999 is 99990004004.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (40040009957) and next prime (40040010041).

It is a cyclic number.

It is not a de Polignac number, because 40040009999 - 2¹² = 40040005903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040009929) 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, 2191994 + ... + 2210184.

It is an arithmetic number, because the mean of its divisors is an integer number (2742444000).

Almost surely, 2^40040009999 is an apocalyptic number.

40040009999 is a deficient number, since it is larger than the sum of its proper divisors (3839094001).

40040009999 is a wasteful number, since it uses less digits than its factorization.

40040009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19102.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 40040009999 in words is "forty billion, forty million, nine thousand, nine hundred ninety-nine".