43386641664 has 144 divisors (see below), whose sum is σ = 128699887680. Its totient is φ = 12895027200.

The previous prime is 43386641657. The next prime is 43386641671. The reversal of 43386641664 is 46614668334.

It is an interprime number because it is at equal distance from previous prime (43386641657) and next prime (43386641671).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160614 + ... + 335514.

It is an arithmetic number, because the mean of its divisors is an integer number (893749220).

Almost surely, 2^43386641664 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 43386641664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64349943840).

43386641664 is an abundant number, since it is smaller than the sum of its proper divisors (85313246016).

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

43386641664 is a wasteful number, since it uses less digits than its factorization.

43386641664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174956 (or 174942 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 51.

The spelling of 43386641664 in words is "forty-three billion, three hundred eighty-six million, six hundred forty-one thousand, six hundred sixty-four".