478008220664 has 64 divisors (see below), whose sum is σ = 987922320000. Its totient is φ = 215430316416.

The previous prime is 478008220661. The next prime is 478008220667. The reversal of 478008220664 is 466022800874.

It is an interprime number because it is at equal distance from previous prime (478008220661) and next prime (478008220667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478008220661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19499087 + ... + 19523585.

It is an arithmetic number, because the mean of its divisors is an integer number (15436286250).

Almost surely, 2^478008220664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 478008220664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493961160000).

478008220664 is an abundant number, since it is smaller than the sum of its proper divisors (509914099336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

478008220664 is a wasteful number, since it uses less digits than its factorization.

478008220664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28924 (or 28920 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 47.

The spelling of 478008220664 in words is "four hundred seventy-eight billion, eight million, two hundred twenty thousand, six hundred sixty-four".