13466813440 has 44 divisors (see below), whose sum is σ = 32304583116. Its totient is φ = 5386723328.

The previous prime is 13466813431. The next prime is 13466813489. The reversal of 13466813440 is 4431866431.

It can be written as a sum of positive squares in 2 ways, for example, as 8546632704 + 4920180736 = 92448^2 + 70144^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 13466813393 and 13466813402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309999 + ... + 1320238.

Almost surely, 2^13466813440 is an apocalyptic number.

13466813440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13466813440 is an abundant number, since it is smaller than the sum of its proper divisors (18837769676).

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

13466813440 is an equidigital number, since it uses as much as digits as its factorization.

13466813440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630262 (or 2630244 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 13466813440 in words is "thirteen billion, four hundred sixty-six million, eight hundred thirteen thousand, four hundred forty".