847940816155 has 4 divisors (see below), whose sum is σ = 1017528979392. Its totient is φ = 678352652920.

The previous prime is 847940816153. The next prime is 847940816201. The reversal of 847940816155 is 551618049748.

847940816155 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 not a de Polignac number, because 847940816155 - 2¹ = 847940816153 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 847940816155.

It is not an unprimeable number, because it can be changed into a prime (847940816153) 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, 84794081611 + ... + 84794081620.

It is an arithmetic number, because the mean of its divisors is an integer number (254382244848).

Almost surely, 2^847940816155 is an apocalyptic number.

847940816155 is a deficient number, since it is larger than the sum of its proper divisors (169588163237).

847940816155 is a wasteful number, since it uses less digits than its factorization.

847940816155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169588163236.

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 847940816155 in words is "eight hundred forty-seven billion, nine hundred forty million, eight hundred sixteen thousand, one hundred fifty-five".