73243443555 has 12 divisors (see below), whose sum is σ = 126955302240. Its totient is φ = 39063169872.

The previous prime is 73243443551. The next prime is 73243443607. The reversal of 73243443555 is 55534434237.

It is a happy number.

73243443555 is a `hidden beast` number, since 7 + 3 + 24 + 34 + 43 + 555 = 666.

It is not a de Polignac number, because 73243443555 - 2² = 73243443551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1627632079 = 73243443555 / (7 + 3 + 2 + 4 + 3 + 4 + 4 + 3 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 73243443555.

It is not an unprimeable number, because it can be changed into a prime (73243443551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 813815995 + ... + 813816084.

It is an arithmetic number, because the mean of its divisors is an integer number (10579608520).

Almost surely, 2^73243443555 is an apocalyptic number.

73243443555 is a deficient number, since it is larger than the sum of its proper divisors (53711858685).

73243443555 is a wasteful number, since it uses less digits than its factorization.

73243443555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627632090 (or 1627632087 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 45.

The spelling of 73243443555 in words is "seventy-three billion, two hundred forty-three million, four hundred forty-three thousand, five hundred fifty-five".