1191441698556 has 24 divisors (see below), whose sum is σ = 2855166594000. Its totient is φ = 386413523712.

The previous prime is 1191441698539. The next prime is 1191441698569. The reversal of 1191441698556 is 6558961441911.

It is a self number, because there is not a number n which added to its sum of digits gives 1191441698556.

It is a congruent number.

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, 1341713181 + ... + 1341714068.

It is an arithmetic number, because the mean of its divisors is an integer number (118965274750).

Almost surely, 2^{1191441698556} is an apocalyptic number.

It is an amenable number.

1191441698556 is an abundant number, since it is smaller than the sum of its proper divisors (1663724895444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191441698556 is a wasteful number, since it uses less digits than its factorization.

1191441698556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683427293 (or 2683427291 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 60.

The spelling of 1191441698556 in words is "one trillion, one hundred ninety-one billion, four hundred forty-one million, six hundred ninety-eight thousand, five hundred fifty-six".