43721481852 has 36 divisors (see below), whose sum is σ = 110530940520. Its totient is φ = 14572145952.

The previous prime is 43721481851. The next prime is 43721481863. The reversal of 43721481852 is 25818412734.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 43721481798 and 43721481807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43721481851) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 268774 + ... + 399602.

Almost surely, 2^43721481852 is an apocalyptic number.

It is an amenable number.

43721481852 is an abundant number, since it is smaller than the sum of its proper divisors (66809458668).

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

43721481852 is a wasteful number, since it uses less digits than its factorization.

43721481852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140122 (or 140117 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The spelling of 43721481852 in words is "forty-three billion, seven hundred twenty-one million, four hundred eighty-one thousand, eight hundred fifty-two".