40078847857 has 8 divisors (see below), whose sum is σ = 40153521440. Its totient is φ = 40004223840.

The previous prime is 40078847839. The next prime is 40078847899. The reversal of 40078847857 is 75874887004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40078847857 - 2²³ = 40070459249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40078847657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863994 + ... + 1885372.

It is an arithmetic number, because the mean of its divisors is an integer number (5019190180).

Almost surely, 2^40078847857 is an apocalyptic number.

It is an amenable number.

40078847857 is a deficient number, since it is larger than the sum of its proper divisors (74673583).

40078847857 is a wasteful number, since it uses less digits than its factorization.

40078847857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24783.

The product of its (nonzero) digits is 14049280, while the sum is 58.

The spelling of 40078847857 in words is "forty billion, seventy-eight million, eight hundred forty-seven thousand, eight hundred fifty-seven".