43806978847 has 4 divisors (see below), whose sum is σ = 44029349496. Its totient is φ = 43584608200.

The previous prime is 43806978829. The next prime is 43806978857. The reversal of 43806978847 is 74887960834.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43806978847 - 2¹¹ = 43806976799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43806978857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111185029 + ... + 111185422.

It is an arithmetic number, because the mean of its divisors is an integer number (11007337374).

Almost surely, 2^43806978847 is an apocalyptic number.

43806978847 is a deficient number, since it is larger than the sum of its proper divisors (222370649).

43806978847 is a wasteful number, since it uses less digits than its factorization.

43806978847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222370648.

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 43806978847 in words is "forty-three billion, eight hundred six million, nine hundred seventy-eight thousand, eight hundred forty-seven".