318746477820 has 96 divisors (see below), whose sum is σ = 904331070720. Its totient is φ = 83878612480.

The previous prime is 318746477807. The next prime is 318746477831. The reversal of 318746477820 is 28774647813.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1293664 + ... + 1520216.

It is an arithmetic number, because the mean of its divisors is an integer number (9420115320).

Almost surely, 2^318746477820 is an apocalyptic number.

318746477820 is a gapful number since it is divisible by the number (30) 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 318746477820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452165535360).

318746477820 is an abundant number, since it is smaller than the sum of its proper divisors (585584592900).

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

318746477820 is a wasteful number, since it uses less digits than its factorization.

318746477820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226875 (or 226873 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 57.

The spelling of 318746477820 in words is "three hundred eighteen billion, seven hundred forty-six million, four hundred seventy-seven thousand, eight hundred twenty".