40000040043 has 4 divisors (see below), whose sum is σ = 53333386728. Its totient is φ = 26666693360.

The previous prime is 40000040039. The next prime is 40000040077. The reversal of 40000040043 is 34004000004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40000040043 - 2² = 40000040039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40000040023) 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, 6666673338 + ... + 6666673343.

It is an arithmetic number, because the mean of its divisors is an integer number (13333346682).

Almost surely, 2^40000040043 is an apocalyptic number.

40000040043 is a deficient number, since it is larger than the sum of its proper divisors (13333346685).

40000040043 is a wasteful number, since it uses less digits than its factorization.

40000040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13333346684.

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 40000040043 its reverse (34004000004), we get a palindrome (74004040047).

The spelling of 40000040043 in words is "forty billion, forty thousand, forty-three".