473638591861 has 4 divisors (see below), whose sum is σ = 473663991724. Its totient is φ = 473613192000.

The previous prime is 473638591831. The next prime is 473638591883. The reversal of 473638591861 is 168195836374.

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: 168195836374 = 2 ⋅84097918187.

It can be written as a sum of positive squares in 2 ways, for example, as 272760730225 + 200877861636 = 522265^2 + 448194^2 .

It is a cyclic number.

It is not a de Polignac number, because 473638591861 - 2¹¹ = 473638589813 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 473638591861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (473638591831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12671940 + ... + 12709261.

It is an arithmetic number, because the mean of its divisors is an integer number (118415997931).

Almost surely, 2^473638591861 is an apocalyptic number.

It is an amenable number.

473638591861 is a deficient number, since it is larger than the sum of its proper divisors (25399863).

473638591861 is a wasteful number, since it uses less digits than its factorization.

473638591861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25399862.

The product of its digits is 26127360, while the sum is 61.

The spelling of 473638591861 in words is "four hundred seventy-three billion, six hundred thirty-eight million, five hundred ninety-one thousand, eight hundred sixty-one".