1091969228218 has 24 divisors (see below), whose sum is σ = 1867926072096. Its totient is φ = 474769224600.

The previous prime is 1091969228213. The next prime is 1091969228281. The reversal of 1091969228218 is 8128229691901.

It is not an unprimeable number, because it can be changed into a prime (1091969228213) 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, 46902318 + ... + 46925593.

It is an arithmetic number, because the mean of its divisors is an integer number (77830253004).

Almost surely, 2^{1091969228218} is an apocalyptic number.

1091969228218 is a deficient number, since it is larger than the sum of its proper divisors (775956843878).

1091969228218 is a wasteful number, since it uses less digits than its factorization.

1091969228218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93827970 (or 93827947 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 58.

The spelling of 1091969228218 in words is "one trillion, ninety-one billion, nine hundred sixty-nine million, two hundred twenty-eight thousand, two hundred eighteen".