43312612261820 has 96 divisors (see below), whose sum is σ = 100755048102912. Its totient is φ = 15507800000000.

The previous prime is 43312612261819. The next prime is 43312612261823. The reversal of 43312612261820 is 2816221621334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43312612261823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10064945 + ... + 13708695.

It is an arithmetic number, because the mean of its divisors is an integer number (1049531751072).

Almost surely, 2^{43312612261820} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43312612261820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50377524051456).

43312612261820 is an abundant number, since it is smaller than the sum of its proper divisors (57442435841092).

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

43312612261820 is a wasteful number, since it uses less digits than its factorization.

43312612261820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644603 (or 3644601 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 43312612261820 in words is "forty-three trillion, three hundred twelve billion, six hundred twelve million, two hundred sixty-one thousand, eight hundred twenty".