478891681920 has 128 divisors (see below), whose sum is σ = 1696074768000. Its totient is φ = 127704443904.

The previous prime is 478891681913. The next prime is 478891681949. The reversal of 478891681920 is 29186198874.

478891681920 is a `hidden beast` number, since 478 + 8 + 91 + 68 + 19 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13839540 + ... + 13874099.

It is an arithmetic number, because the mean of its divisors is an integer number (13250584125).

Almost surely, 2^478891681920 is an apocalyptic number.

478891681920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

478891681920 is an abundant number, since it is smaller than the sum of its proper divisors (1217183086080).

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

478891681920 is a wasteful number, since it uses less digits than its factorization.

478891681920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27713667 (or 27713649 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 478891681920 in words is "four hundred seventy-eight billion, eight hundred ninety-one million, six hundred eighty-one thousand, nine hundred twenty".