67728969555 has 32 divisors (see below), whose sum is σ = 116864778240. Its totient is φ = 33297048960.

The previous prime is 67728969541. The next prime is 67728969577. The reversal of 67728969555 is 55596982776.

It is not a de Polignac number, because 67728969555 - 2¹¹ = 67728967507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67728969555.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101331 + ... + 381740.

It is an arithmetic number, because the mean of its divisors is an integer number (3652024320).

Almost surely, 2^67728969555 is an apocalyptic number.

67728969555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

67728969555 is a deficient number, since it is larger than the sum of its proper divisors (49135808685).

67728969555 is a wasteful number, since it uses less digits than its factorization.

67728969555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483811.

The product of its digits is 285768000, while the sum is 69.

The spelling of 67728969555 in words is "sixty-seven billion, seven hundred twenty-eight million, nine hundred sixty-nine thousand, five hundred fifty-five".