111628284778 has 16 divisors (see below), whose sum is σ = 177115997376. Its totient is φ = 52656104160.

The previous prime is 111628284763. The next prime is 111628284787. The reversal of 111628284778 is 877482826111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16617888 + ... + 16624603.

It is an arithmetic number, because the mean of its divisors is an integer number (11069749836).

Almost surely, 2^111628284778 is an apocalyptic number.

111628284778 is a deficient number, since it is larger than the sum of its proper divisors (65487712598).

111628284778 is a wasteful number, since it uses less digits than its factorization.

111628284778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33242589.

The product of its digits is 2408448, while the sum is 55.

The spelling of 111628284778 in words is "one hundred eleven billion, six hundred twenty-eight million, two hundred eighty-four thousand, seven hundred seventy-eight".