478621695481 has 4 divisors (see below), whose sum is σ = 478625038992. Its totient is φ = 478618351972.

The previous prime is 478621695473. The next prime is 478621695509. The reversal of 478621695481 is 184596126874.

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.

It is a cyclic number.

It is not a de Polignac number, because 478621695481 - 2³ = 478621695473 is a prime.

It is a super-2 number, since 2×478621695481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478621695581) 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, 1446955 + ... + 1746688.

It is an arithmetic number, because the mean of its divisors is an integer number (119656259748).

Almost surely, 2^478621695481 is an apocalyptic number.

It is an amenable number.

478621695481 is a deficient number, since it is larger than the sum of its proper divisors (3343511).

478621695481 is a wasteful number, since it uses less digits than its factorization.

478621695481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343510.

The product of its digits is 23224320, while the sum is 61.

The spelling of 478621695481 in words is "four hundred seventy-eight billion, six hundred twenty-one million, six hundred ninety-five thousand, four hundred eighty-one".