478261348309 has 4 divisors (see below), whose sum is σ = 503432998240. Its totient is φ = 453089698380.

The previous prime is 478261348307. The next prime is 478261348321. The reversal of 478261348309 is 903843162874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 903843162874 = 2 ⋅451921581437.

It is a cyclic number.

It is not a de Polignac number, because 478261348309 - 2¹ = 478261348307 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 478261348309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478261348307) 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, 12585824937 + ... + 12585824974.

It is an arithmetic number, because the mean of its divisors is an integer number (125858249560).

Almost surely, 2^478261348309 is an apocalyptic number.

It is an amenable number.

478261348309 is a deficient number, since it is larger than the sum of its proper divisors (25171649931).

478261348309 is a wasteful number, since it uses less digits than its factorization.

478261348309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25171649930.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 478261348309 in words is "four hundred seventy-eight billion, two hundred sixty-one million, three hundred forty-eight thousand, three hundred nine".