43947720612 has 60 divisors (see below), whose sum is σ = 121646156940. Its totient is φ = 13787518464.

The previous prime is 43947720599. The next prime is 43947720631. The reversal of 43947720612 is 21602774934.

43947720612 is a `hidden beast` number, since 4 + 3 + 9 + 4 + 7 + 7 + 20 + 612 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28306716516 + 15641004096 = 168246^2 + 125064^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3983937 + ... + 3994952.

It is an arithmetic number, because the mean of its divisors is an integer number (2027435949).

Almost surely, 2^43947720612 is an apocalyptic number.

It is an amenable number.

43947720612 is an abundant number, since it is smaller than the sum of its proper divisors (77698436328).

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

43947720612 is a wasteful number, since it uses less digits than its factorization.

43947720612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978922 (or 7978911 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 43947720612 in words is "forty-three billion, nine hundred forty-seven million, seven hundred twenty thousand, six hundred twelve".