1191122549736 has 384 divisors, whose sum is σ = 3645676661760. Its totient is φ = 322934169600.

The previous prime is 1191122549717. The next prime is 1191122549737. The reversal of 1191122549736 is 6379452211911.

It is not an unprimeable number, because it can be changed into a prime (1191122549737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 962911710 + ... + 962912946.

It is an arithmetic number, because the mean of its divisors is an integer number (9493949640).

Almost surely, 2^{1191122549736} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1191122549736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822838330880).

1191122549736 is an abundant number, since it is smaller than the sum of its proper divisors (2454554112024).

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

1191122549736 is a wasteful number, since it uses less digits than its factorization.

1191122549736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1774 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The spelling of 1191122549736 in words is "one trillion, one hundred ninety-one billion, one hundred twenty-two million, five hundred forty-nine thousand, seven hundred thirty-six".