43990268542 has 16 divisors (see below), whose sum is σ = 72055172592. Its totient is φ = 19975827520.

The previous prime is 43990268527. The next prime is 43990268563. The reversal of 43990268542 is 24586209934.

It is a self number, because there is not a number n which added to its sum of digits gives 43990268542.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 964663 + ... + 1009234.

It is an arithmetic number, because the mean of its divisors is an integer number (4503448287).

Almost surely, 2^43990268542 is an apocalyptic number.

43990268542 is a deficient number, since it is larger than the sum of its proper divisors (28064904050).

43990268542 is a wasteful number, since it uses less digits than its factorization.

43990268542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974923.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 43990268542 in words is "forty-three billion, nine hundred ninety million, two hundred sixty-eight thousand, five hundred forty-two".