478211531645 has 4 divisors (see below), whose sum is σ = 573853837980. Its totient is φ = 382569225312.

The previous prime is 478211531579. The next prime is 478211531647. The reversal of 478211531645 is 546135112874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 279336561529 + 198874970116 = 528523^2 + 445954^2 .

It is a cyclic number.

It is not a de Polignac number, because 478211531645 - 2⁸ = 478211531389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478211531645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478211531647) 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, 47821153160 + ... + 47821153169.

It is an arithmetic number, because the mean of its divisors is an integer number (143463459495).

Almost surely, 2^478211531645 is an apocalyptic number.

It is an amenable number.

478211531645 is a deficient number, since it is larger than the sum of its proper divisors (95642306335).

478211531645 is an equidigital number, since it uses as much as digits as its factorization.

478211531645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95642306334.

The product of its digits is 806400, while the sum is 47.

The spelling of 478211531645 in words is "four hundred seventy-eight billion, two hundred eleven million, five hundred thirty-one thousand, six hundred forty-five".