40000000443999 has 16 divisors (see below), whose sum is σ = 53505899551872. Its totient is φ = 26580518864928.

The previous prime is 40000000443961. The next prime is 40000000444049. The reversal of 40000000443999 is 99934400000004.

It is a de Polignac number, because none of the positive numbers 2^k-40000000443999 is a prime.

It is a super-2 number, since 2×40000000443999² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40000000443999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000004443999) 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, 15651069 + ... + 18026534.

It is an arithmetic number, because the mean of its divisors is an integer number (3344118721992).

Almost surely, 2^{40000000443999} is an apocalyptic number.

40000000443999 is a deficient number, since it is larger than the sum of its proper divisors (13505899107873).

40000000443999 is a wasteful number, since it uses less digits than its factorization.

40000000443999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33678886.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 40000000443999 in words is "forty trillion, four hundred forty-three thousand, nine hundred ninety-nine".