18475880446464 has 160 divisors (see below), whose sum is σ = 56290183804800. Its totient is φ = 5275282685952.

The previous prime is 18475880446453. The next prime is 18475880446469. The reversal of 18475880446464 is 46464408857481.

It is not an unprimeable number, because it can be changed into a prime (18475880446469) 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, 15477262 + ... + 16628210.

It is an arithmetic number, because the mean of its divisors is an integer number (351813648780).

Almost surely, 2^{18475880446464} is an apocalyptic number.

18475880446464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18475880446464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28145091902400).

18475880446464 is an abundant number, since it is smaller than the sum of its proper divisors (37814303358336).

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

18475880446464 is a wasteful number, since it uses less digits than its factorization.

18475880446464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152470 (or 1152454 counting only the distinct ones).

The product of its (nonzero) digits is 660602880, while the sum is 69.

The spelling of 18475880446464 in words is "eighteen trillion, four hundred seventy-five billion, eight hundred eighty million, four hundred forty-six thousand, four hundred sixty-four".