40009712894 has 4 divisors (see below), whose sum is σ = 60014569344. Its totient is φ = 20004856446.

The previous prime is 40009712863. The next prime is 40009712909. The reversal of 40009712894 is 49821790004.

40009712894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002428222 + ... + 10002428225.

It is an arithmetic number, because the mean of its divisors is an integer number (15003642336).

Almost surely, 2^40009712894 is an apocalyptic number.

40009712894 is a deficient number, since it is larger than the sum of its proper divisors (20004856450).

40009712894 is a wasteful number, since it uses less digits than its factorization.

40009712894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20004856449.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 40009712894 in words is "forty billion, nine million, seven hundred twelve thousand, eight hundred ninety-four".