43213616640 has 400 divisors, whose sum is σ = 155550669120. Its totient is φ = 11466178560.

The previous prime is 43213616627. The next prime is 43213616657. The reversal of 43213616640 is 4661631234.

43213616640 is a `hidden beast` number, since 4 + 3 + 2 + 1 + 3 + 6 + 1 + 6 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43213616595 and 43213616604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56194176 + ... + 56194944.

Almost surely, 2^43213616640 is an apocalyptic number.

43213616640 is a gapful number since it is divisible by the number (40) 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 43213616640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77775334560).

43213616640 is an abundant number, since it is smaller than the sum of its proper divisors (112337052480).

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

43213616640 is an equidigital number, since it uses as much as digits as its factorization.

43213616640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 43213616640 in words is "forty-three billion, two hundred thirteen million, six hundred sixteen thousand, six hundred forty".