947654643841 has 4 divisors (see below), whose sum is σ = 947657987332. Its totient is φ = 947651300352.

The previous prime is 947654643839. The next prime is 947654643851. The reversal of 947654643841 is 148346456749.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 148346456749 = 4217 ⋅35178197.

It can be written as a sum of positive squares in 2 ways, for example, as 475141383025 + 472513260816 = 689305^2 + 687396^2 .

It is a cyclic number.

It is not a de Polignac number, because 947654643841 - 2¹ = 947654643839 is a prime.

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 947654643841.

It is not an unprimeable number, because it can be changed into a prime (947654643811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202736 + ... + 1828081.

It is an arithmetic number, because the mean of its divisors is an integer number (236914496833).

Almost surely, 2^947654643841 is an apocalyptic number.

It is an amenable number.

947654643841 is a deficient number, since it is larger than the sum of its proper divisors (3343491).

947654643841 is a wasteful number, since it uses less digits than its factorization.

947654643841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343490.

The product of its digits is 69672960, while the sum is 61.

The spelling of 947654643841 in words is "nine hundred forty-seven billion, six hundred fifty-four million, six hundred forty-three thousand, eight hundred forty-one".