43640457368 has 32 divisors (see below), whose sum is σ = 83869097760. Its totient is φ = 21280296960.

The previous prime is 43640457361. The next prime is 43640457373. The reversal of 43640457368 is 86375404634.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43640457361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 237353 + ... + 378968.

It is an arithmetic number, because the mean of its divisors is an integer number (2620909305).

Almost surely, 2^43640457368 is an apocalyptic number.

It is an amenable number.

43640457368 is a deficient number, since it is larger than the sum of its proper divisors (40228640392).

43640457368 is a wasteful number, since it uses less digits than its factorization.

43640457368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616547 (or 616543 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 50.

The spelling of 43640457368 in words is "forty-three billion, six hundred forty million, four hundred fifty-seven thousand, three hundred sixty-eight".